Informed Consent 
 
Guidance for IRBs, Clinical 
Investigators, and Sponsors 
 
 
 
 
 
 
 
U.S. Department of Health and Human Services 
Food and Drug Administration 
Office of Clinical Policy 
Center for Drug Evaluation and Research 
Center for Biologics Evaluation and Research 
Center for Devices and Radiological Health 
 
 
 
August 2023 
Good Clinical Practice
  Contains Nonbinding Recommendations 
 
Informed Consent 
 
Guidance for IRBs, Clinical 
Investigators, and Sponsors 
 
 
Additional copies are available from: 
Office of Clinical Policy 
Food and Drug Administration 
10903 New Hampshire Avenue 
WO32, Rm. 5103 
Silver Spring, MD 20993 
(Tel) (301) 796-8340 
Email: gcpquestions@fda.hhs.gov  
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/clinical-trials-guidance-
documents  
 
 
U.S. Department of Health and Human Services 
Food and Drug Administration 
 
August 2023 
Good Clinical Practice 
 
  Contains Nonbinding Recommendations 
 
  TABLE OF CONTENTS 
 
I.  INTRODUCTION ......................................................................................................................... 1 
II.  SUMMARY OF THE CONSENT PROCESS ............................................................................. 3 
III.  FDA INFORMED CONSENT REQUIREMENTS AND DISCUSSION ................................. 5 
A. General Requirements for Informed Consent ................................................................................ 5 
1. Exceptions to Informed Consent .................................................................................................. 6 
2. Coercion and Undue Influence ..................................................................................................... 6 
3. Language Understandable to the Subject or the Legally Authorized Representative ............ 8 
4. Exculpatory Language ................................................................................................................... 9 
B. Basic Elements of Informed Consent ............................................................................................ 10 
1. Description of Clinical Investigation .......................................................................................... 10 
2. Risks and Discomforts ................................................................................................................. 12 
3. Benefits .......................................................................................................................................... 13 
4. Alternative Procedures or Treatments ...................................................................................... 14 
5. Confidentiality .............................................................................................................................. 16 
6. Compensation and Medical Treatment in Event of Injury ...................................................... 17 
7. Contacts ........................................................................................................................................ 18 
8. Voluntary Participation ............................................................................................................... 18 
C. Additional Elements of Informed Consent ................................................................................... 19 
1. Unforeseeable Risks ..................................................................................................................... 19 
2. Involuntary Termination of Subjects Participation ................................................................ 20 
3. Additional Costs to Subject ......................................................................................................... 20 
4. Consequences of Subjects Decision to Withdraw .................................................................... 22 
5. Providing Significant New Findings to Subjects ....................................................................... 23 
6. Number of Subjects...................................................................................................................... 23 
D. Element of Informed Consent for Applicable Clinical Trials ................................................. 23 
E. Documentation of Informed Consent ............................................................................................ 24 
1.  Requirement for Written Documentation of Informed Consent ............................................. 24 
 
  Contains Nonbinding Recommendations 
 
2. Alternative Methods of Obtaining Informed Consent .............................................................. 25 
3. Requirement for Dating Consent Form ..................................................................................... 27 
4. Forms for Documentation of Informed Consent ....................................................................... 27 
a.  Long Form ............................................................................................................................. 28 
b.  Short Form ............................................................................................................................ 28 
IV.  RESPONSIBILITIES FOR INFORMED CONSENT ............................................................. 29 
A. The IRB ............................................................................................................................................ 30 
1. Review of All Informed Consent Materials ............................................................................... 30 
a.  Adequacy and Appropriateness of Wording ...................................................................... 32 
b.  Use of Standardized Language ............................................................................................ 32 
2. Review of the Consent Process .................................................................................................... 33 
3. IRB Review of Updated Informed Consent Documents ........................................................... 34 
4. Identification of Revised Consent Forms ................................................................................... 35 
B. The Clinical Investigator ................................................................................................................ 35 
1. Delegation of Consent Discussion ............................................................................................... 36 
2. Financial Relationships and Interests ........................................................................................ 37 
C. The Sponsor ..................................................................................................................................... 38 
1. Considerations for Multicenter Clinical Investigations ............................................................ 38 
2. Sponsor Personnel ........................................................................................................................ 39 
D. The FDA ........................................................................................................................................... 39 
1. Investigational New Drugs and Biologics .................................................................................. 40 
2. Investigational Medical Devices .................................................................................................. 41 
V.  FREQUENTLY ASKED QUESTIONS ..................................................................................... 42 
1. What are some considerations for enrolling a child into a clinical investigation? ................. 42 
2. Are there any additional protections required when enrolling children who are wards of the 
state? ............................................................................................................................................. 45 
3. What are some considerations for enrolling non-English speaking subjects? ....................... 46 
4. What process should be followed when it is expected that subjects who do not understand 
English will be enrolled? ............................................................................................................. 47 
 
  Contains Nonbinding Recommendations 
 
5. What process should be followed when the enrollment of subjects who do not understand 
English is not expected?............................................................................................................... 47 
6. What should be considered when enrolling subjects with low literacy and numeracy? ....... 50 
7. What should be considered when enrolling subjects with physical or sensory disabilities? . 51 
8. What should be considered when enrolling adult subjects with impaired consent capacity?51 
9. Who can serve as a legally authorized representative (LAR) and what is their role? ........... 53 
10. How can informed consent be obtained through electronic methods? .................................. 54 
11. Can a subject participate in more than one clinical investigation simultaneously? ............. 54 
12. How should data be handled when an enrolled subject decides to withdraw from a trial? 55 
13. What steps should be taken to inform subjects when a study is suspended or terminated?56 
14. Should subjects be informed of aggregate study results at the completion of a trial? ......... 57 
15. Is informed consent required to review patient records? ....................................................... 58 
16. How should subjects be informed of new information that may affect their willingness to 
continue participation in the research? ..................................................................................... 60 
 
  Contains Nonbinding Recommendations 
 
Informed Consent 
Guidance for IRBs, Clinical Investigators, and Sponsors1 
 
 
This guidance represents the current thinking of the Food and Drug Administration (FDA or Agency) on 
this topic.  It does not create any rights for any person and is not binding on FDA or the public.  You can 
use an alternative approach if it satisfies the requirements of the applicable statutes and regulations.  To 
discuss an alternative approach, contact the FDA staff responsible for this guidance as listed on the title 
page. 
 
 
I.  INTRODUCTION 
 
This guidance is intended to assist institutional review boards (IRBs), clinical investigators, and sponsors 
in complying with FDAs informed consent regulations for clinical investigations.  This guidance 
supersedes FDAs guidance entitled A Guide to Informed Consent, issued in September 1998, and 
finalizes FDAs draft guidance entitled Informed Consent Information Sheet, issued in July 2014.  This 
document is structured to first present general guidance on FDAs regulatory requirements for informed 
consent and a discussion of the roles of IRBs, clinical investigators, sponsors, and FDA related to 
informed consent, followed by a series of frequently asked questions. 
In a final rule published on January 19, 2017, the Department of Health and Human Services (HHS) and 
other federal departments and agencies revised the Federal Policy for Protection of Human Subjects.  The 
final rule became effective in 2018 (codified for HHS at 45 CFR 46, subpart A; the 2018 Common 
Rule).2, 3  The 2018 Common Rule sets forth requirements for the protection of human subjects involved 
in research that is conducted or supported by federal departments or agencies that have adopted the 
Common Rule.  The revisions include significant changes to the provisions regarding informed consent.  
FDA is currently engaged in notice and comment rulemaking to harmonize its human subject protection 
 
1 This guidance document was developed by the Office of Clinical Policy (OCLiP), in coordination with the Center 
for Biologics Evaluation and Research (CBER), the Center for Devices and Radiological Health (CDRH), and the 
Center for Drug Evaluation and Research (CDER). 
2 82 FR 7149, January 19, 2017; https://www.govinfo.gov/content/pkg/FR-2017-01-19/pdf/2017-01058.pdf.  In this 
guidance, this final rule will be referred to as the 2018 Common Rule 
3 All references to the Code of Federal Regulations (CFR) throughout this document can be found at www.ecfr.gov.  
  1  Contains Nonbinding Recommendations 
 
regulations and the 2018 Common Rule to the extent practicable and consistent with other statutory 
provisions.4  This guidance does not address possible future changes to the FDAs informed consent 
regulations that may be developed as part of our harmonization efforts.  FDA may revise this guidance 
document in the future to reflect any such changes and/or to address questions the Agency receives 
regarding informed consent. 
 
FDAs informed consent requirements are set forth in FDAs regulations on Protection of Human 
Subjects (21 CFR part 50).  These regulations apply to clinical investigations regulated by FDA.5, 6 
Throughout this document we primarily provide guidance related to the requirements described in 21 
CFR part 50; however, where appropriate we will describe additional regulations pertaining to informed 
consent found in FDAs regulations on Investigational New Drug Applications (21 CFR part 312) and 
Investigational Device Exemptions (21 CFR part 812).  The informed consent requirements in FDA 
regulations are not intended to preempt any applicable Federal, State, or local laws that require additional 
information to be disclosed for informed consent to be legally effective (21 CFR 50.25(d)).  If a clinical 
investigation7 as defined at 21 CFR 50.3(c) is conducted or supported by HHS then the study may 
additionally be subject to 45 CFR part 46.  Where the regulations differ, the regulations that offer the 
greater protection to human subjects should be followed.8 
In general, FDAs guidance documents, including this guidance, do not establish legally enforceable 
responsibilities. Instead, guidances describe the Agencys current thinking on a topic and should be 
viewed only as recommendations, unless specific regulatory or statutory requirements are cited. The use 
 
4 On September 28, 2022, FDA issued proposed rules to harmonize certain provisions of 21 CFR parts 50 and 56 
with the 2018 Common Rule to the extent practicable and consistent with other statutory provisions (see 87 FR 
58733 at https://www.federalregister.gov/documents/2022/09/28/2022-21088/protection-of-human-subjects-
and-institutional-review-boards, and 87 FR 58752 at 
https://www.federalregister.gov/documents/2022/09/28/2022-21089/institutional-review-boards-cooperative-
research). 
5 21 CFR part 50 applies to all clinical investigations regulated by the [FDA] under sections 505(i) and 520(g) of the 
Federal Food, Drug, and Cosmetic Act, as well as clinical investigations that support applications for research or 
marketing permits for products regulated by the [FDA], including foods, including dietary supplements, that bear a 
nutrient content claim or a health claim, infant formulas, food and color additives, drugs for human use, medical 
devices for human use, biological products for human use, and electronic products. (21 CFR 50.1)  
6 IRB authority and responsibilities for reviewing informed consent forms are set forth in 21 CFR part 56. 
7 In this guidance document, the terms clinical investigation, study, research, and trial are used interchangeably 
8 See FDA Guidance for Sponsors, Investigators, and Institutional Review Board; Impact of Certain Provisions of 
the Revised Common Rule on FDA-Regulated Clinical Investigations at https://www.fda.gov/regulatory-
information/search-fda-guidance-documents/impact-certain-provisions-revised-common-rule-fda-regulated-
clinical-investigations. 
  2  Contains Nonbinding Recommendations 
 
of the word should in Agency guidance means that something is suggested or recommended, but not 
required. 
 
 
II.  SUMMARY OF THE CONSENT PROCESS 
 
To many, the term informed consent is mistakenly viewed as synonymous with obtaining a subjects 
signature on the consent form;9 however, obtaining documentation of a subjects informed consent is only 
part of the consent process.  Informed consent involves providing a prospective subject, or their legally 
authorized representative (LAR), with adequate information to allow for an informed decision about 
participation in the clinical investigation prior to enrollment.  Informed consent also involves facilitating 
the prospective subjects understanding of the information, providing adequate opportunity for the 
prospective subject to ask questions and to consider whether to participate, obtaining the prospective 
subjects voluntary agreement to participate prior to enrollment, and continuing to provide information as 
the clinical investigation progresses or as the enrolled subject or situation requires.10 
 
Except as provided in 21 CFR 50.23 and 50.24,11 (see section III.A.1, Exceptions to Informed 
Consent), no investigator may involve a human being as a subject in FDA-regulated research unless the 
investigator has obtained the legally effective informed consent of the subject or the subjects LAR (21 
 
9 In this guidance document, the terms informed consent form and informed consent document are used 
interchangeably. 
10 See 21 CFR 50.20. 
11 FDA has issued a proposed rule that, if finalized, would allow an exception from the requirement to obtain 
informed consent when a clinical investigation poses no more than minimal risk to the human subject and includes 
appropriate safeguards to protect the rights, safety, and welfare of human subjects. 83 FR 57378, November 15, 
2018.  This proposed rule would implement new authorities provided in the 21st Century Cures Act.  In the interim, 
FDA has issued guidance regarding IRB waiver or alteration of informed consent for certain clinical investigations 
involving no more than minimal risk.  See FDA Guidance for Sponsors, Investigators, and Institutional Review 
Boards; IRB Waiver or Alteration of Informed Consent for Clinical Investigations Involving No More Than Minimal 
Risk to Human Subjects, available at https://www.fda.gov/regulatory-information/search-fda-guidance-
documents/irb-waiver-or-alteration-informed-consent-clinical-investigations-involving-no-more-minimal-risk. 
  3  Contains Nonbinding Recommendations 
 
CFR 50.20). 12  To be legally effective, the informed consent process must satisfy the general 
requirements under 21 CFR 50.20 and include the relevant elements of informed consent described at 21 
CFR 50.25 (see section III, FDA Informed Consent Requirements and Discussion). 
 
FDA considers advertising used to recruit subjects into the clinical trial to be the start of the ongoing 
consent process, and the information provided in any online or hard copy recruitment materials should be 
consistent with the informed consent document.  Generally, FDA recommends that any advertisement to 
recruit subjects be limited to the information the prospective subjects need to determine their interest and 
potential eligibility.  The FDA information sheet Recruiting Study Subjects includes information 
regarding scripts for those who will interface with subjects to determine basic eligibility.13  
 
Once a prospective subject is identified, and before research activities requiring prior consent occur, a 
person knowledgeable about the clinical investigation and capable of answering questions raised by the 
prospective subject should conduct a consent discussion.  The consent discussion and the consent form 
must contain information to allow prospective subjects to make an informed decision about participation 
in a clinical investigation and provide an opportunity for prospective subjects to ask questions about the 
clinical investigation and the information in the consent document (see section III, FDA Informed 
Consent Requirements and Discussion) (21 CFR 50.20 and 21 CFR 50.25).14  The consent form serves 
several purposes, including helping to ensure that prospective subjects receive the required information, 
providing a "take home" reminder of the elements of the clinical investigation, providing contact 
information in case additional questions or concerns arise, and documenting prospective subjects 
voluntary agreement to participate as well as the date of their agreement. 
 
The informed consent process is an ongoing exchange of information throughout a subjects participation 
in a clinical trial and does not end after the consent form is signed.  For example, if new safety 
 
12 As described in guidance, FDA intends to exercise enforcement discretion, under certain circumstances, with 
respect to its current regulations governing the requirement for informed consent when human specimens are 
used for FDA-regulated in vitro diagnostic (IVD) device investigations. See Guidance on Informed Consent for in 
Vitro Diagnostic Device Studies Using Leftover Human Specimens that are Not Individually Identifiable: Guidance 
for Sponsors, Institutional Review Boards, and Food and Drug Administration Staff, available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-informed-consent-vitro-
diagnostic-device-studies-using-leftover-human-specimens-are-not 
13 See the FDA Information Sheet Recruiting Study Subjects, available at https://www.fda.gov/regulatory-
information/search-fda-guidance-documents/recruiting-study-subjects, for further information. 
14 The regulations allow use of a short form consent form when the elements of informed consent are presented 
orally to the subject (21 CFR 50.27(b)(2)).  For a discussion of the short form written consent, see section III.E.4.b, 
Short Form. 
  4  Contains Nonbinding Recommendations 
 
information or protocol changes occur during the conduct of the study, additional information may need 
to be given to the subject, and/or the subject may need additional opportunities to ask questions and 
receive answers throughout the clinical investigation (see section III.C.5, Providing Significant New 
Findings to Subjects, and Frequently Asked Question #16). 
 
III.  FDA INFORMED CONSENT REQUIREMENTS AND DISCUSSION 
 
The informed consent process and consent form must meet the general requirements of 21 CFR 50.20, 
and must include the basic elements of informed consent required by 21 CFR 50.25(a) (when used, a 
short form written consent document states that the elements of informed consent required by 21 CFR 
50.25 have been presented orally; see section III.E.4.b Short Form for more details).  If appropriate to 
the clinical investigation, one or more of the additional elements of informed consent at 21 CFR 50.25(b) 
must also be addressed.  For applicable clinical trials as defined in 42 U.S.C. 282(j)(1)(A) initiated on 
or after March 7, 2012, an additional element of informed consent (i.e., inclusion of the specified 
statement regarding ClinicalTrials.gov) is required by 21 CFR 50.25(c).15  The text of 21 CFR 50.20 and 
21 CFR 50.25 is set out in italics below, followed by a discussion of each regulation. 
 
A.  General Requirements for Informed Consent 
 
21 CFR 50.20: 
  Except as provided in 50.23, and 50.24, no investigator may involve a human being as a subject 
in research covered by these regulations unless the investigator has obtained the legally effective 
informed consent of the subject or the subject's legally authorized representative. 
  An investigator shall seek such consent only under circumstances that provide the prospective 
subject or the representative sufficient opportunity to consider whether or not to participate and 
that minimize the possibility of coercion or undue influence. 
  The information that is given to the subject or the representative shall be in language 
understandable to the subject or the representative. 
  No informed consent, whether oral or written, may include any exculpatory language through 
which the subject or the representative is made to waive or appear to waive any of the subject's 
legal rights, or releases or appears to release the investigator, the sponsor, the institution, or its 
agents from liability for negligence. 
 
 
15 For further information, see section III.D, Element of Informed Consent for Applicable Clinical Trials. 
  5  Contains Nonbinding Recommendations 
 
1.  Exceptions to Informed Consent 
 
Informed consent is required for participation in FDA-regulated clinical investigations except under 
limited circumstances as described in 21 CFR 50.23 (involving certain life-threatening situations, military 
operations, or public health emergencies) and 21 CFR 50.24 (involving emergency research16) (see 21 
CFR 50.20).  We note that, to implement statutory changes made to the Federal Food, Drug, and 
Cosmetic Act (FD&C) Act by section 3024 of the 21st Century Cures Act (Cures Act), FDA issued a 
proposed rule that, if finalized, would allow IRBs responsible for the review, approval, and continuing 
review of clinical investigations to approve an informed consent procedure that waives or alters certain 
informed consent elements or that waives the requirement to obtain informed consent for certain minimal 
risk clinical investigations.17,18  In addition, FDA issued guidance explaining that until the Agency 
promulgates regulations implementing the Cures Act amendments to the FD&C Act, FDA does not intend 
to object to an IRB approving a consent procedure that does not include, or that alters, some or all of the 
elements of informed consent set forth in 21 CFR 50.25, or to an IRB waiving the requirements to obtain 
informed consent for certain minimal risk clinical investigations under the circumstances described in the 
guidance.19  Nothing in FDA's informed consent regulations is intended to limit the authority of a 
physician to provide emergency medical care to the extent the physician is permitted to do so under 
applicable Federal, State, or local law (21 CFR 50.25(e)). 
 
2.  Coercion and Undue Influence 
 
The conditions under which informed consent is sought and the relationship between the subject and the 
person obtaining consent should be carefully considered to minimize the possibility of coercion or undue 
influence (21 CFR 50.20).  According to the Belmont Report, Coercion occurs when an overt threat of 
harm is intentionally presented by one person to another in order to obtain compliance.  Undue influence, 
 
16 See "Guidance for Institutional Review Boards, Clinical Investigators, and Sponsors; Exception from Informed 
Consent Requirements for Emergency Research, available at https://www.fda.gov/regulatory-information/search-
fda-guidance-documents/exception-informed-consent-requirements-emergency-research. 
17 See section 3024 of the Cures Act, Pub. L. 114-255, available at 
https://www.congress.gov/114/plaws/publ255/PLAW-114publ255.pdf. 
18 See Institutional Review Board Waiver or Alteration of Informed Consent for Minimal Risk Clinical 
Investigations, (83 FR 57378, November 15, 2018) at https://www.govinfo.gov/content/pkg/FR-2018-11-
15/pdf/2018-24822.pdf. 
19 See Guidance for Sponsors, Investigators, and Institutional Review Boards; IRB Waiver of Alteration of Informed 
Consent for Clinical Investigations Involving No More Than Minimal Risk to Human Subjects, available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/irb-waiver-or-alteration-informed-
consent-clinical-investigations-involving-no-more-minimal-risk. 
  6  Contains Nonbinding Recommendations 
 
by contrast, occurs through an offer of an excessive, unwarranted, inappropriate or improper reward or 
other overture in order to obtain compliance.20 
 
For example, if an employer seeks to enroll employees in a clinical investigation sponsored or conducted 
by the employer, the informed consent process should contain safeguards to ensure that participation is 
voluntary and that the possibility of undue influence or coercion by supervisors, peers, or others is 
minimized.  Similarly, because of a potential conflict of interest and the nature of the physician-patient 
relationship,21 when the investigator is also the prospective subjects physician, for example, the-
investigator should ensure that the prospective subject understands that enrollment in the clinical 
investigation is voluntary, and that a decision to forgo enrollment will not adversely affect their medical 
care, in accordance with 21 CFR 50.25(a)(8).  The consent process and form should emphasize that an 
individuals participation is truly voluntary. 
 
Note that coercion and undue influence may be situational, and can affect any population, not just subject 
populations seen as vulnerable to coercion or undue influence.  For example, in a clinical investigation 
involving the collection of extra tissue samples during a planned surgical procedure, waiting to obtain 
informed consent until the prospective subject is in the preoperative area would generally fail to minimize 
the possibility of undue influence.  The possibility of undue influence could be addressed by first 
discussing the study with the prospective subject during a preoperative visit as part of the informed 
consent process.  The prospective subject could be told that the study will be reviewed with them again 
prior to the procedure and, after all questions are resolved, they will be asked to sign a consent form 
acknowledging their willingness to participate in the study at that time. 
 
In addition, statements that claim investigational drugs and devices are safe or effective for the purposes 
for which they are being investigated are prohibited (21 CFR 312.7(a) and 21 CFR 812.7(d)).  Likewise, 
statements that overstate the possibility of benefit may unduly influence prospective subjects by leading 
them to incorrectly assume that it is known that the investigational product will be of benefit to them, 
influencing them to agree to participate when they might not have otherwise chosen to do so.  For 
example, wording that refers to the clinical investigation as a therapeutic trial could contribute to a 
 
20 The Belmont Report was written by the National Commission for the Protection of Human Subjects of 
Biomedical and Behavioral Research.  The Commission, created as a result of the National Research Act of 1974, 
was charged with identifying the basic ethical principles that should underlie the conduct of biomedical and 
behavioral research involving human subjects and developing guidelines to assure that such research is conducted 
in accordance with those principles.  See Belmont Report, available at https://www.hhs.gov/ohrp/regulations-and-
policy/belmont-report/index.html. 
21 For the purposes of this document physician means a medical doctor or other appropriate healthcare providers. 
  7  Contains Nonbinding Recommendations 
 
prospective subjects misunderstanding that the trial will offer a direct benefit for their disease or 
condition. 
 
Furthermore, we generally recommend against including statements such as "FDA has given permission 
for the clinical investigation to proceed" or "FDA has approved the clinical investigation in the informed 
consent process, because such statements may suggest to subjects that the investigation has FDAs 
endorsement.  In addition, these statements may not be accurate for the particular clinical investigation at 
issue (see, e.g., 21 CFR 312.40(b) and 21 CFR 812.2(b)). 
 
FDA does not consider reimbursement for reasonable travel expenses to and from the clinical trial site 
(e.g., airfare, gas, tolls), and associated costs, such as parking and lodging, to raise issues related to 
coercion or undue influence.  Reimbursement for other expenses may be considered by an IRB on a case-
by-case basis, and IRBs should consider whether the proposed remuneration could be an undue influence.  
Payment for participation in research should be just and fair.  This topic is also discussed under section 
III.B.3, Benefits. 
 
Finally, as discussed in FDAs Information Sheet, Guidance for Institutional Review Boards and Clinical 
Investigators, Payment and Reimbursement to Research Subjects, paying research subjects in exchange 
for their participation is a common and, in general, acceptable practice.22  FDA recognizes that payment 
to subjects for participation in clinical investigations, which is not specifically addressed by FDA 
regulations, may in some cases, raise difficult questions that should be addressed by IRBs.  For example, 
an IRB should address how much money research subjects should receive, and for what subjects should 
receive payment (e.g., their time, inconvenience, discomfort, or some other consideration).  However, 
FDA does not consider payment to research subjects for participating in research a benefit that can be 
used to justify risk when IRBs evaluate whether risks to subjects are reasonable in relation to anticipated 
benefit as required by 21 CFR 56.111(a)(2).  IRBs should review both the amount of payment and the 
proposed method and timing of disbursement to assure that they are not coercive and do not present 
undue influence (21 CFR 50.20).  As a general rule, FDA does not believe genuine offers of payment 
raise questions about coercion; however, an overt threat of harm presented in the guise of an offer of 
payment (e.g., a threat to withhold payment that had already been promised) would still be coercive. 
 
3.  Language Understandable to the Subject or the Legally Authorized Representative 
 
 
22 See the FDA Information Sheet, Guidance for Institutional Review Boards and Clinical Investigators, Payment 
and Reimbursement to Research Subjects, available at https://www.fda.gov/regulatory-information/search-fda-
guidance-documents/payment-and-reimbursement-research-subjects. 
  8  Contains Nonbinding Recommendations 
 
The information given to the prospective subject, which includes both information provided orally during 
the consent discussion and written information in the consent form, must be in language understandable 
to the prospective subject or LAR (21 CFR 50.20).  Understandable means the information presented to 
prospective subject is in a language and at a level the subjects can comprehend (including an explanation 
of scientific and medical terms). 
 
4.  Exculpatory Language 
 
The consent process must not include exculpatory language through which a subject, or the LAR, is made 
to waive or appear to waive any of their legal rights, or release or appear to release the investigator, the 
sponsor, the institution, or its agents from liability for negligence (21 CFR 50.20).  FDA considers 
exculpatory language to be language that has the general effect of freeing or appearing to free an 
individual or an entity from malpractice, negligence, blame, fault, or guilt.23 
The following are examples of exculpatory language that would violate 21 CFR 50.20, and therefore 
cannot appear in consent forms: 
  I waive any possibility of compensation, including any right to sue for injuries that I may receive 
as a result of being in this study. 
  If you suffer an injury as a result of being in this study, neither the institution nor the investigator 
can assume financial responsibility or liability for the expenses of treatment for such injury. 
 
Examples of language that would not be considered exculpatory are included below (see also section 
III.B.6, Compensation and Medical Treatment in Event of Injury): 
  You do not give up any of your legal rights by being in this study, and you may choose to pursue 
legal action if you are injured by being in the study. 
  If you are injured as a result of being in this study, paying for the cost of your medical care will 
be your responsibility or that of your health insurance company.  However, signing this form does 
not stop you from pursuing legal action for the injury. 
 
 
23 For additional discussion of exculpatory language, see the joint draft guidance from the HHS Office for Human 
Research Protections (OHRP) and FDA, Guidance on Exculpatory Language in Informed Consent, available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/exculpatory-language-informed-
consent.  When finalized the guidance will represent FDAs current thinking on this issue. When finalized, the 
examples in the draft may be revised.   
  9  Contains Nonbinding Recommendations 
 
B.  Basic Elements of Informed Consent 
 
As discussed in this section, FDA regulations identify eight basic elements of informed consent to be 
provided to the subject (21 CFR 50.25(a)).  The text of each of the eight elements is italicized below, 
followed by a discussion of the element.  As discussed in section III.E.4.b Short Form, when a short 
form written consent document is used, the document must state that the elements of informed consent 
required by 21 CFR 50.25 have been presented orally to the subject or the subjects LAR (21 CFR 
50.27(b)(2)). 
(a) Basic elements of informed consent.  In seeking informed consent, the following information 
shall be provided to each subject: 
 
1.  Description of Clinical Investigation 
 
A statement that the study involves research, an explanation of the purposes of the 
research and the expected duration of the subject's participation, a description of the 
procedures to be followed, and identification of any procedures which are experimental.  
(21 CFR 50.25(a)(1)) 
 
A clear statement that the clinical investigation involves research is important to make prospective 
subjects aware that, although preliminary data (bench, animal, pilot studies, literature) may exist, the 
purpose of the subjects participation is primarily to contribute to research (for example, to evaluate the 
safety and effectiveness of the test article or to evaluate a different dose or route of administration of an 
approved drug), rather than to their own medical treatment. 
 
FDA recommends that when discussing the required elements of informed consent with prospective 
subjects, there should first be a discussion of the care a patient would likely receive if not part of the 
research, if relevant, and then the potential subject should be provided with information about the 
research.  This sequence allows prospective subjects to understand how the research differs from the care 
they might otherwise receive.  The description of the clinical investigation should identify tests or 
procedures required by the protocol that would not be part of their care outside of the research; for 
example, drawing blood samples for a pharmacokinetic study.  Note that all experimental procedures 
must be identified as such (21 CFR 50.25(a)(1)).  Procedures related solely to research must be explained 
(for example, protocol-driven versus individualized dosing, randomized assignment to treatment, blinding 
of subject and investigator, and receipt of placebo if the study is placebo-controlled) (21 CFR 
50.25(a)(1)).  In some cases, tests or procedures that would be considered part of usual clinical care will 
not be performed on study participants; when applicable, this should be discussed as part of the informed 
consent process. 
  10  Contains Nonbinding Recommendations 
 
 
The description of the clinical investigation must describe the test article (e.g., the investigational product 
under study) and, if used in the study, the control (21 CFR 50.25(a)(1)).  The description should include 
relevant information on what is known about both the test article and the control.  For example, the 
description should indicate whether the test article is approved or cleared24 for marketing and describe the 
use(s) for which it has been approved or cleared.  The description should also provide relevant 
information about any control used in the study: for example, whether the control is FDA approved or 
cleared for marketing, considered a medically recognized standard of care25, or is a placebo (including an 
explanation of what a placebo is).  The information provided about the test article and control should 
include appropriate and reliable information about the potential benefits and risks of each, to the extent 
such information is available.  For clinical investigations involving the comparison of an investigational 
product to one or more standards of care, it may be acceptable to describe the most common risks and 
benefits of the standard(s) of care in the consent form and provide additional information that may be 
relevant to a particular subject as part of the consent discussion, if appropriate. 
 
The consent process should outline what the subjects participation will involve in order to comply with 
the protocol, for example, the number of clinic visits, maintenance of diaries, and medical or dietary 
restrictions (including the need to avoid specific medications or activities, such as participation in other 
clinical investigations26).  If describing every procedure would make the consent form too lengthy or 
detailed, FDA recommends providing the general procedures in the consent form with an addendum 
describing the details of the study procedures to be performed at each visit.  It may be helpful to provide a 
chart outlining what happens at each study visit to simplify the consent form and assist the prospective 
subject in understanding what participation in the clinical investigation will involve.  FDA believes that 
removing procedural details from the consent form will reduce its length, enhance its readability, and 
allow the consent document to focus on content related to the risks and anticipated benefits, if any. 
 
The informed consent process must clearly describe the expected duration of the subjects participation in 
the clinical investigation (see 21 CFR 50.25(a)(1)), which includes their active participation as well as 
 
24 For purposes of this guidance, when approved or cleared is used in discussing devices, the terms refer to FDA 
permitting the marketing of a device via the premarket approval, premarket notification (510(k)), De Novo 
classification, or Humanitarian Device Exemption (HDE) pathways. 
25 For the purposes of this guidance only, FDA generally would consider a medically recognized standard of care to 
be one evidenced by publication in a peer reviewed journal as a generally recognized standard of care or 
recognition by a professional medical society (e.g., in a clinical guideline). 
26 For additional information see Frequently Asked Question #11, Can a subject participate in more than one 
clinical investigation simultaneously? 
  11  Contains Nonbinding Recommendations 
 
long-term follow-up, if appropriate.  Prospective subjects must be informed of the procedures that will 
occur during such follow-up (21 CFR 50.25(a)(1)), which may be provided in a chart as described above. 
 
2.  Risks and Discomforts 
 
A description of any reasonably foreseeable risks or discomforts to the subject.  (21 CFR 
50.25(a)(2)) 
 
The informed consent process must describe the reasonably foreseeable risks or discomforts to the 
subject.  This includes risks or discomforts of tests, interventions and procedures required by the protocol 
(including protocol-specified standard medical procedures, exams, and tests), with a particular focus on 
those that carry significant risk of morbidity or mortality.  Possible risks or discomforts due to changes to 
a subjects medical care (e.g., by changing the subjects stable medication regimen or by stopping the 
subjects current treatment and randomizing them to either the investigational drug or placebo) should 
also be addressed.  Where relevant, participants should also be made aware of the possibility of 
unintended disclosures of private information and be provided with an explanation of measures to protect 
a subjects privacy and data, and limitations to those measures.27  The explanation of potential risks of the 
test article and control, if any, and an assessment of the likelihood of these risks occurring should be 
based on reliable and accurate information presented in the protocol, investigators brochure, labeling, 
and/or previous research reports.  Reasonably foreseeable discomforts to the subject must also be 
described (21 CFR 50.25(a)(2)).  For example, the consent form should disclose that the subject may be 
uncomfortable having to stay in one position or experience claustrophobia-like symptoms during an MRI.  
For clinical investigations involving the comparison of an investigational product to one or more 
standards of care, it may be acceptable to describe the more common and significant risks and 
discomforts of the standard of care in the informed consent form and provide additional risk information, 
as appropriate, as part of the consent discussion. 
 
Any reasonably foreseeable risks or discomforts to the subject need to be described in the informed 
consent form; however, it is not necessary to describe all possible risks, especially if doing so could make 
the form overwhelming for subjects to read.  Information on risks that are more likely to occur and those 
that are serious should be described so that prospective subjects can understand the nature of the risk.  
The discussion may include information on whether a risk is reversible, and the probability of the risk 
based on existing data.  Information on what may be done to mitigate serious risks, and risks and 
discomforts more likely to occur, should also be considered for inclusion. 
 
27 Note, 21 CFR 56.111(a)(7) requires IRBs to determine, where appropriate, that there are adequate provisions to 
protect the privacy of subjects and to maintain the confidentiality of data.  
  12  Contains Nonbinding Recommendations 
 
 
The description should not understate the probability and magnitude of the reasonably foreseeable risks 
and discomforts.  If applicable, the consent document should include a description of the reasonably 
foreseeable risks to the subject, but also the potential for risk to others (for example, radiation therapy 
where close proximity to subjects post-procedure may create some risk to others).  In situations where 
there may be a risk to others, efforts to mitigate the potential risk (e.g., using separate bathrooms) may be 
included in the consent document or provided in a separate document and given to the subject during the 
consent discussion. 
 
When appropriate, a statement must be included that a particular treatment or procedure may involve 
currently unforeseeable risks to the subject (or to the subjects embryo or fetus, if the subject is or may 
become pregnant) (21 CFR 50.25(b)(1); see section III.C.1, Unforeseeable Risks).  If unanticipated 
risks are reported during the investigation, the informed consent discussion and documents may need to 
be updated with the additional risks (21 CFR 50.25(a)(2); see Frequently Asked Question #16). 
 
3.  Benefits 
 
A description of any benefits to the subject or to others which may reasonably be expected 
from the research.  (21 CFR 50.25(a)(3)) 
 
Potential benefits should be explained in terms of any direct impact to the prospective subject, in addition 
to the anticipated societal benefit of the research.  The description of potential benefits to the subject from 
the use of the test article (and control, if appropriate) should include appropriate details, and should be 
clear, balanced, and based on reliable information to the extent such information is available.  For clinical 
investigations involving the comparison of an investigational product to one or more standards of care, it 
may be acceptable to generally describe the benefits of the standard of care in the informed consent form 
and provide more specific information about the standard of care as part of the consent discussion rather 
than in the consent document.  This element requires a description of the potential benefits not only to the 
subject (for example, This product is intended to decrease XXX; however, we cannot guarantee that you 
will receive any benefit from it or from being in the study.), but also to others (for example, Your 
participation in this research may not benefit you, but information learned from this study may benefit 
patients with your disease or condition in the future.).   
 
Overly optimistic representations of the benefits of the test article being studied in the clinical 
investigation may be misleading and may violate FDA regulations that prohibit promotion of 
investigational drugs and devices (21 CFR 312.7 and 21 CFR 812.7).  Where the purpose of the study is 
to determine the safety and/or effectiveness of the test article, there is usually significant uncertainty 
regarding whether, and to what extent, the test article provides a benefit.  If there is no potential for direct 
  13  Contains Nonbinding Recommendations 
 
benefit to the prospective subject, which may be the case, for example, in a phase I study in healthy 
volunteers, this point should be clearly stated.  An example of a way in which to describe in the consent 
document that an investigational product does not have direct benefits to participating subjects would be 
to state There are no direct benefits to you from taking part in this study. 
 
If payments, including reimbursement for research-related expenses incurred by subjects due to 
participation, are provided, the consent process should not identify them as benefits.28   
4.  Alternative Procedures or Treatments 
 
A disclosure of appropriate alternative procedures or courses of treatment, if any, that 
might be advantageous to the subject.  (21 CFR 50.25(a)(4)) 
 
To enable an informed decision about taking part in a clinical investigation, consent forms must disclose 
appropriate alternatives to entering the clinical investigation, if any, that might be advantageous to the 
subject (21 CFR 50.25(a)(4)).  Prospective subjects must be informed of the appropriate alternatives 
available to them, including a description of the care they would be likely to receive if they choose not to 
participate in the research.  This includes alternatives such as approved therapies for the patients disease 
or condition, other forms of therapy (e.g., surgical) or diagnosis, and when appropriate, supportive care 
with no disease-directed therapy.  This disclosure must include a description of the current medically 
recognized standard of care, particularly in studies of medical products intended to treat or diagnose 
serious diseases or conditions.  The current medically recognized standard of care may include uses or 
treatment regimens for a legally marketed drug or device that are not included in the products approved 
or cleared uses.  When describing in the consent form an unapproved use or treatment regimen of an 
approved or cleared drug or device that the sponsor markets, and such use or treatment regimen is a part 
of the medically recognized standard of care, the consent form can provide factual information 
concerning the unapproved use or treatment regimen of the drug or device. However, this information 
should not be presented in a promotional manner.  If a sponsor has questions related to this issue, they 
may contact FDA for feedback.29 
 
28 See the FDA Information Sheet Payment and Reimbursement to Research Subjects, available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/payment-and-reimbursement-
research-subjects. 
29 As FDA has recognized in prior guidance, unapproved new uses or treatment regimens for approved or cleared 
drugs or devices may be important and may even constitute medically recognized standard of care.  See FDA 
Guidance for Industry; Good Reprint Practices for the Distribution of Medical Journal Articles and Medical or 
Scientific Reference Publications on Unapproved New Uses of Approved Drugs and Approved or Cleared Medical 
Devices, available at https://downloads.regulations.gov/FDA-2008-D-0053-0127/content.pdf.   
  14  Contains Nonbinding Recommendations 
 
 
A statement identifying alternative therapies and indicating that the alternatives will be discussed by the 
clinical investigator in more detail, if appropriate, may be used if there is more than one alternative.  FDA 
recommends that treatment options lacking evidence of therapeutic value not be included.  If additional 
alternative procedures or courses of treatment become available during the course of the clinical 
investigation, the informed consent discussion and documents may need to be updated (see 21 CFR 
50.25(a)(4) and 50.25(b)(5) and Frequently Asked Question #16). 
 
When disclosing appropriate alternative procedures or courses of treatment, FDA recommends that a 
description of any reasonably foreseeable risks or discomforts and potential benefits associated with these 
alternatives should be disclosed during the informed consent process, although not necessarily included in 
the written informed consent document.  Where such descriptions or disclosures can contain quantified 
comparative estimates of the reasonably foreseeable risks or discomforts and potential benefits (e.g., from 
the clinical literature) between the alternatives, they should do so.  The Agency does not believe that 
providing such quantified comparative estimates for every case would be realistic or appropriate.30  
Where such well-defined estimates are not possible, the Agency believes that a description of the risks 
and benefits should be sufficient.  While this should be more than just a list of alternatives, a full 
risk/benefit explanation of alternatives may not be appropriate to include in the written document.  
However, the person(s) obtaining the prospective subjects consent should be able to discuss available 
alternatives and answer the prospective subjects questions. 
 
It may be appropriate to refer the subject to their primary care provider or another healthcare professional 
who can more fully discuss the alternatives, for example, when alternatives include various combinations 
of treatments such as radiation, surgery, and chemotherapy for some cancers.  Such discussions with an 
appropriate healthcare professional should be completed prior to the subject signing and dating the 
consent form. 
 
While an individual subject may be eligible for more than one clinical investigation, that determination 
and the decision as to which trial would be most appropriate for a particular subject would need to be 
made on a case-by-case basis.  A discussion of other trials for which the subject may be eligible would 
generally be more appropriate to address as part of the informed consent discussion, rather than the 
 
30 Federal Register, Protection of Human Subjects; Informed Consent (46 FR 8942, January 27, 1981), available at 
https://www.fda.gov/science-research/clinical-trials-and-human-subject-protection/protection-human-subjects-
informed-consent; see response to comment 23. 
  15  Contains Nonbinding Recommendations 
 
informed consent document.31  The subject may also wish to seek input from a primary care or other 
healthcare provider on this issue. 
 
As applicable, the informed consent process should advise that participation in one clinical investigation 
may preclude an individuals eligibility to participate in other clinical investigations.  When there are 
multiple clinical investigations for evaluating the treatment of a particular disease for which a subject may 
be eligible, the sequence in which a subject may participate in the clinical investigations may be 
important and should be discussed with the prospective subject.  For example, participation in a study of a 
drug for a specific therapeutic category may be an exclusion criterion for another study.  The prospective 
subject may wish to discuss the study with their primary care provider, if appropriate. 
 
5.  Confidentiality 
 
A statement describing the extent, if any, to which confidentiality of records identifying the 
subject will be maintained and that notes the possibility that the Food and Drug 
Administration may inspect the records.  (21 CFR 50.25(a)(5)) 
 
The consent process must describe the extent to which confidentiality of records identifying subjects will 
be maintained (21 CFR 50.25(a)(5)) and should identify all entities, for example, the study sponsor, the 
research team, regulatory agencies, and/or ethics committee members, who may gain access to the records 
relating to the clinical investigation.  The consent process must also note the possibility that FDA may 
inspect records (21 CFR 50.25(a)(5)) and should not state or imply that FDA needs permission from the 
subject for access to the records.  Under the Health Insurance Portability and Accountability Act (HIPAA) 
Privacy Rule, FDA does not need permission to inspect records containing protected health information 
(45 CFR 164.512).  FDA may inspect study records to assess investigator compliance with the study 
protocol and the validity of the data reported by the sponsor. 
 
FDA may inspect and copy records relating to a clinical investigation (see, e.g., sections 704(a) and 
704(e) of the FD&C Act, 21 CFR 56.115(b), 312.58(a), 312.68, and 812.145(b)).  FDA generally will not 
copy records that include the subject's name unless it is necessary to do so for the reasons described in 21 
CFR 312.68 and 812.145, such as when there is reason to question whether the records represent the 
actual cases studied or results obtained.  When FDA requires subject names or other information that 
could connect the individual subject with the personal health information contained in the record, FDA 
will generally treat such information as confidential, but on rare occasions, FDA may be required to 
 
31 For additional advice regarding the need to avoid coercion and undue influence during the informed consent 
process, see Section III.A.2. 
  16  Contains Nonbinding Recommendations 
 
disclose this information to third parties, for example, if required by a court of law (see 5 U.S.C. 
552(b)(6); see also 21 CFR 20.63(a) and 20.83(a)-(b)).  Therefore, the consent process should not promise 
or imply absolute confidentiality with regard to records that may be inspected by FDA.32 
 
6.  Compensation and Medical Treatment in Event of Injury 
 
For research involving more than minimal risk, an explanation as to whether any 
compensation and an explanation as to whether any medical treatments are available if 
injury occurs and, if so, what they consist of, or where further information may be 
obtained.  (21 CFR 50.25(a)(6)) 
 
For clinical investigations involving more than minimal risk, the informed consent process must describe 
any compensation and medical treatments available to subjects if injury occurs33 (21 CFR 50.25(a)(6)).  
Because available compensation and medical treatments may vary depending on the medical 
circumstances of the individual subject or the policies of the institution, the consent process should 
include an explanation to subjects of where they may obtain further information.  An example of an 
adequate statement is: 
The sponsor has made plans to pay for medical costs related to research-related injuries 
followed by an explanation of how to obtain further information. 
 
If no compensation is available, the consent process should include a statement such as:34 
 
32 When appropriate, a sponsor may request a discretionary Certificate of Confidentiality (CoC).  A CoC generally 
prohibits a researcher from disclosing identifiable, sensitive information about the research participant, created or 
compiled for purposes of the research, in any Federal, State, or local civil, criminal, administrative, legislative, or 
other proceeding.  There are some exceptions to the prohibition on disclosure of such information.  See FDA 
guidance Certificates of Confidentiality, available at https://www.fda.gov/media/132966/download.   
33 Investigators should ensure that subjects have access to reasonable medical care for medical problems arising 
during their participation in the clinical investigation that are, or could be, related to the study intervention.  See 
pages 7-8 of FDAs Guidance for Industry Investigator Responsibilities  Protecting the Rights, Safety, and Welfare 
of Study Subjects, available at https://www.fda.gov/regulatory-information/search-fda-guidance-
documents/investigator-responsibilities-protecting-rights-safety-and-welfare-study-subjects. 
34 For additional discussion of exculpatory language, see the joint draft guidance from OHRP and FDA, Guidance 
on Exculpatory Language in Informed Consent, which, when final, will represent FDAs current thinking on this 
topic, available at https://www.fda.gov/regulatory-information/search-fda-guidance-documents/exculpatory-
language-informed-consent. 
  17  Contains Nonbinding Recommendations 
 
Because of hospital policy, the hospital is not able to pay for your medical care if you are injured as 
a result of being in this study.  If you are injured as a result of being in this study, you or your 
insurance will be responsible for paying your medical expenses.  However, you do not give up any of 
your legal rights by being in this study, and you may choose to pursue legal action if you are injured 
by being in the study. 
See section III.A.4, Exculpatory Language, for additional information. 
 
7.  Contacts 
 
An explanation of whom to contact for answers to pertinent questions about the research 
and research subjects' rights, and whom to contact in the event of a research-related 
injury to the subject.  (21 CFR 50.25(a)(7)) 
 
The consent document (or oral presentation, if a short form is used) must provide information on how to 
contact an appropriate individual for questions about the clinical investigation and the subjects rights, 
and whom to contact in the event that a research-related injury to the subject occurs (21 CFR 50.25(a)(7)).  
This information should include contact names (or offices), email addresses, and their telephone numbers.  
FDA recommends that the individual or office named for questions about subjects' rights not be part of 
the investigational team, because subjects may be hesitant to report specific concerns or identify possible 
problems to someone who is part of the investigational team.  Therefore, an appropriate contact for 
subjects rights questions may be the IRB Office, the facilitys Patient Advocate Office, or other staff 
with training regarding the rights of clinical trials subjects.  In addition, the consent process should 
include information on whom to contact and what to do in the event of an emergency, including 24-hour 
contact information, if appropriate.35 
 
If contact information changes during the clinical investigation, then the new contact information must be 
provided to the subject (21 CFR 50.25(a)(7)).  This may be done through a variety of ways, for example, 
a card providing the relevant contact information for the clinical investigation may be given to the subject 
during a visit or mailed to the subject in an envelope to protect the subjects privacy. 
 
8.  Voluntary Participation    
 
 
35 See pages 7-8 of FDAs Guidance for Industry Investigator Responsibilities  Protecting the Rights, Safety, and 
Welfare of Study Subjects, available at https://www.fda.gov/regulatory-information/search-fda-guidance-
documents/investigator-responsibilities-protecting-rights-safety-and-welfare-study-subjects. 
  18  Contains Nonbinding Recommendations 
 
A statement that participation is voluntary, that refusal to participate will involve no 
penalty or loss of benefits to which the subject is otherwise entitled, and that the subject 
may discontinue participation at any time without penalty or loss of benefits to which the 
subject is otherwise entitled.  (21 CFR 50.25(a)(8)) 
 
This element requires that subjects be informed that they may decline to take part in the clinical 
investigation or may stop participation at any time without penalty or loss of benefits to which subjects 
are entitled (21 CFR 50.25(a)(8)).  Language that limits the subject's right to decline to participate or 
withdraw from the clinical investigation must not be used.  If special procedures should be followed for 
the subject to withdraw from the clinical investigation, the consent process must outline and explain the 
procedures (21 CFR 50.25(b)(4); see section III.C.4, Consequences of Subjects Decision to 
Withdraw). Written withdrawal from the study by the subject is not a requirement. When possible, the 
site staff should document the withdrawal and the date it occurred.   Note, when a subject withdraws from 
a study conducted under an investigational new drug application (IND) or investigational device 
exemption (IDE), the data collected on the subject to the point of withdrawal remains part of the study 
database and may not be removed.36 
 
C.  Additional Elements of Informed Consent 
 
FDA regulations identify six additional elements of informed consent to be provided to each subject, 
when appropriate.  (21 CFR 50.25(b)) 
 
(b) Additional elements of informed consent.  When appropriate, one or more of the following 
elements of information shall also be provided to each subject: 
 
The following elements are appropriate to provide to prospective subjects when the IRB determines 
the information is material to prospective subjects decisions to participate: 
 
1.  Unforeseeable Risks 
 
A statement that the particular treatment or procedure may involve risks to the subject (or 
to the embryo or fetus, if the subject is or may become pregnant) which are currently 
unforeseeable.  (21 CFR 50.25(b)(1)) 
 
36 See, Guidance for Sponsors, Clinical Investigators, and IRBs; Data Retention When Subjects Withdraw from FDA-
Regulated Clinical Trials, at https://www.fda.gov/regulatory-information/search-fda-guidance-documents/data-
retention-when-subjects-withdraw-fda-regulated-clinical-trials. 
  19  Contains Nonbinding Recommendations 
 
 
When appropriate, the consent process must contain a statement that the particular test article or 
procedure may involve risks to subjects (or to the embryo or fetus, if the subject is or may become 
pregnant) that are currently unforeseeable (21 CFR 50.25(b)(1)).  If long-term safety studies (such as 
bench and animal testing37) are not completed, the informed consent process should explain that 
researchers have not completed studies that may identify potential risks (e.g., carcinogenicity or 
teratogenicity studies), and that there may be potential risks to subjects (or to the embryo or fetus, if the 
subject is or may become pregnant) that are currently unforeseeable (21 CFR 50.25(b)(1)).  Sponsors may 
want to consider whether appropriate birth control measures and notifying the investigator of pregnancy 
should be included in the protocol and addressed in the informed consent document. 
 
2.  Involuntary Termination of Subjects Participation 
 
Anticipated circumstances under which the subject's participation may be terminated by 
the investigator without regard to the subject's consent.  (21 CFR 50.25(b)(2)) 
 
When appropriate, the consent process must inform the subject of anticipated circumstances under which 
the investigator may end the subjects participation without the subject's consent (21 CFR 50.25(b)(2)).  
Such circumstances may arise if, for example, the subject is unable to comply with procedures required 
by the clinical investigation, if the subject meets discontinuation criteria for continuing in the study, or if 
the site withdraws from the study.  A simple statement that the investigator or sponsor may withdraw the 
subject from participation at any time is inadequate and does not inform the subject of anticipated 
circumstances that may trigger their withdrawal from the clinical investigation.  For example, the consent 
process may inform the subject that the investigator may withdraw the subjects participation in the 
clinical investigation if the subject does not follow the instructions given to them by the investigator, such 
as repeatedly failing to return for protocol-required clinic visits or repeatedly failing to follow dosing or 
device instructions.  If a subject is withdrawn from the study, the clinical investigator should explain to 
the subject the reasons for withdrawal, discuss other available treatment or research options, and, if 
appropriate, discuss plans to follow the subject after withdrawal for side effects.  The subject should also 
be informed as to how the data that have already been collected will be handled. 
 
3.  Additional Costs to Subject 
 
Any additional costs to the subject that may result from participation in the research.  (21 
CFR 50.25(b)(3)) 
 
37 FDA supports the principles of the 3Rs, to reduce, refine, and replace animal use in testing when feasible.  FDA 
encourages sponsors to consult with the relevant review division if it they wish to use a non-animal testing method 
they believe is suitable, adequate, validated, and feasible.  FDA will consider if such an alternative method is 
adequate to meet the regulatory need. 
  20  Contains Nonbinding Recommendations 
 
 
If subjects might incur additional expense as a result of taking part in the clinical investigation, the 
consent process must explain the added costs (21 CFR 50.25(b)(3)).  FDA recommends that any 
additional cost that may be charged to the subject, the subjects insurance, or other reimbursement 
mechanism be explained as part of the informed consent process.  Subjects should be made aware that 
insurance or other reimbursement mechanisms might not fund the medical care they receive as a result of 
participating in a clinical investigation even when the care is the standard care they would otherwise 
receive if not participating in a clinical investigation.38 
 
Additionally, insurance or other forms of reimbursement might not pay for care related to complications 
or injuries arising from participation in a clinical investigation (see section III.B.6, Compensation and 
Medical Treatments in Event of Injury).  If the subjects insurance is charged and there are deductibles 
or copayments, the subject should be informed of whether they will be responsible for these costs.  If 
funds will be available to cover costs not covered by insurance or other forms of reimbursement, the 
consent form should describe how these funds will be made available to subjects or direct subjects on 
how to obtain further information.  Because these issues may be complex, it may be appropriate to refer 
the subject to a knowledgeable financial counselor or reimbursement specialist to explain the costs and 
the insurance and reimbursement issues prior to signing the consent form. 
 
In some cases, the cost of an investigational product may be charged to the subject.  In clinical 
investigations involving investigational devices, the sponsor is permitted to recover the costs of research, 
development, manufacture, and handling of investigational devices (see 21 CFR 812.7(b)).  FDA may 
authorize sponsors in certain clinical investigations of drugs to recover the direct costs of making the 
investigational drug available, such as costs to manufacture, ship, and handle (e.g., store) the drug (see 21 
CFR 312.8).39  When these costs are passed to the subject, the consent process must identify these costs 
(21 CFR 50.25(b)(3)). 
 
38 The Patient Protection and Affordable Care Act added section 2709 to the Public Health Service Act (42 U.S.C. 
300gg-8).  Among other things, this provision prohibits a group health plan or health insurance issuer in the group 
and individual health insurance market from denying certain individuals participation in certain clinical trials and 
from denying or limiting coverage of routine patient costs for items or services furnished in connection with 
participation in such trials. 
39 See Guidance for Institutional Review Boards and Clinical Investigators, Charging for Investigational Products, 
available at https://www.fda.gov/regulatory-information/search-fda-guidance-documents/charging-
investigational-products, and Guidance for Industry, Charging for Investigational Drugs Under an IND  Questions 
and Answers, available at https://www.fda.gov/regulatory-information/search-fda-guidance-
documents/charging-investigational-drugs-under-ind-questions-and-answers.  Also, sponsors of expanded access 
INDs and treatment protocols that meet certain requirements may recover other costs than these direct costs.  See 
21 CFR 312.8(d)(2). 
  21  Contains Nonbinding Recommendations 
 
 
Beyond the costs directly related to participation in the research, it may be appropriate to identify 
additional costs that may be incurred, such as any costs associated with participation in the clinical 
investigation, e.g., time off from work, child or elder care, or transportation costs.  To aid the prospective 
subject in understanding these additional costs, the consent process should describe the protocol 
requirements in sufficient detail (e.g., number and duration of study site visits and procedures) to enable 
subjects to appreciate how much time they may need to take away from work, child care, or elder care.  
Prospective subjects should be made aware of direct and indirect costs of participation and informed as to 
what extent these costs will be covered by the sponsor versus paid by the subject (see section III.A.2, 
Coercion and Undue Influence). 
 
4.  Consequences of Subjects Decision to Withdraw 
 
The consequences of a subjects decision to withdraw from the research and procedures 
for orderly termination of participation by the subject.  (21 CFR 50.25(b)(4)) 
 
When appropriate, the consent process must describe the consequences of a subjects decision to 
withdraw from the clinical investigation and the procedures for orderly termination of participation by the 
subject (21 CFR 50.25(b)(4)).  For example, when withdrawal from a clinical investigation may adversely 
affect the subject, the informed consent process must explain the withdrawal procedures that are 
recommended in order to ensure the subject's safety and should specifically state why the withdrawal 
procedures are important to the subject's welfare.  For some clinical investigations, an intervention should 
be withdrawn gradually, or the investigator may recommend follow-up to ensure the subjects safety 
when an investigational intervention is prematurely terminated due to a subjects withdrawal.  In these 
cases, the consent process must explicitly inform the subject of the potential adverse effects of premature 
termination of the investigational intervention.  Prospective subjects should be made aware of the number 
of visits and approximate time required for participation in the study to help them determine if they are 
able to make the commitment to complete the study.  When appropriate, it may be reasonable to counsel 
prospective subjects that they should not participate in the trial if they do not foresee staying in the study.  
If applicable, the consent process must explain whether a subject who withdraws early will receive future 
study payments.40  The subject should also be informed as to how the data that have already been 
collected will be handled (see also section III.B.8, Voluntary Participation). 
 
 
40 For further information about the timing of payments to research participants see the Guidance for Institutional 
Review Boards and Clinical Investigators, Information Sheet: Payment and Reimbursement to Research Subjects, 
available at Payment and Reimbursement to Research Subjects | FDA. 
  22  Contains Nonbinding Recommendations 
 
5.  Providing Significant New Findings to Subjects 
 
A statement that significant new findings developed during the course of the research 
which may relate to the subject's willingness to continue participation will be provided to 
the subject.  (21 CFR 50.25(b)(5)) 
 
The consent process must, when appropriate, include a statement that significant new findings that may 
relate to the subjects willingness to continue participation, such as new risk information, will be provided 
to the subject (21 CFR 50.25(b)(5)).  Significant new findings may include an unexpected adverse event, 
an adverse event occurring at greater frequency or severity than previously stated in the consent process, 
results from interim analyses (in some cases), additional alternative procedures or courses of treatment 
that become available during the course of the clinical investigation, and information from other clinical 
trials about the effectiveness of the investigational product, the comparator, or other products for the same 
indication.  FDA encourages the inclusion of this statement in the consent form for clinical investigations 
where knowledge of risk is limited, for example, clinical investigations involving the first use of an 
investigational product in humans, novel therapies, and new molecular entities, or complex clinical 
investigations that involve significant risk.  Where there are significant new findings, the IRB should 
consider whether enrolled subjects should be contacted to determine if this information impacts their 
decision to continue participation in the clinical investigation (see Frequently Asked Question #16). 
 
6.  Number of Subjects 
 
The approximate number of subjects involved in the study.  (21 CFR 50.25(b)(6)) 
 
When appropriate, the informed consent process must state the approximate number of subjects involved 
in the clinical investigation (21 CFR 50.25(b)(6)).  For example, a subjects decision whether or not to 
participate in the study may be influenced by knowledge that the clinical investigation is a small initial 
trial of the product (such as a phase 1 or 2 drug clinical investigation or a device feasibility clinical 
investigation where only a small number of subjects participate). 
 
D.  Element of Informed Consent for Applicable Clinical Trials41  
 
When seeking informed consent for applicable clinical trials, as defined in 42 U.S.C. 
282(j)(1)(A), the following statement shall be provided to each clinical trial subject in informed 
consent documents and processes.  This will notify the clinical trial subject that clinical trial 
 
41 For further information, see FDAs Guidance for Sponsors, Investigators, and Institutional Review Boards, 
Questions and Answers on Informed Consent Elements, 21 CFR  50.25(c) available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/questions-and-answers-informed-
consent-elements-21-cfr-ss-5025c?source=govdelivery. 
  23  Contains Nonbinding Recommendations 
 
information has been or will be submitted for inclusion in the clinical trial registry databank 
under paragraph (j) of section 402 of the Public Health Service Act.  The statement is: A 
description of this clinical trial will be available on https://www.ClinicalTrials.gov, as required 
by U.S. Law.  This Web site will not include information that can identify you.  At most, the Web 
site will include a summary of the results.  You can search this Web site at any time.  (21 CFR 
50.25(c)) 
 
All informed consent forms for applicable clinical trials42 initiated on or after March 7, 2012, must 
contain the above quoted statement, which cannot be modified (21 CFR 50.25(c)).43  However, additional 
explanation may be provided, if appropriate.  For example, with respect to clinical trials involving 
investigational devices, an additional statement could be added that information about device trials might 
not be made publicly available until after a product is cleared or approved by FDA. 
 
E.  Documentation of Informed Consent 
 
1.  Requirement for Written Documentation of Informed Consent 
 
(a) Except as provided in  56.109(c), informed consent shall be documented by the use of a written 
consent form approved by the IRB and signed and dated by the subject or the subject's legally 
authorized representative at the time of consent.  A copy shall be given to the person signing the 
form.  (21 CFR 50.27(a)) 
 
Informed consent must be documented by a signed and dated written consent form except under two 
specific circumstances as described in FDAs regulations at 21 CFR 56.109(c)44 (21 CFR 50.27).  When 
 
42 For the definition of applicable clinical trial, see 42 USC 282(j)(1)(A) and 42 CFR 11.10(a).  It is the responsibility 
of sponsors and investigators to determine if their clinical trial meets the definition of an applicable clinical trial 
and to ensure compliance with the most current applicable statutory and regulatory requirements.  Information on 
"applicable clinical trials" is available at https://clinicaltrials.gov/ct2/manage-recs/fdaaa. 
43 Note that this statement is not required for child assent. 
44 21 CFR 56.109(c) states, An IRB shall require documentation of informed consent in accordance with section 
50.27 of this chapter, except as follows: 
(1) The IRB may, for some or all subjects, waive the requirement that the subject, or the subject's legally 
authorized representative, sign a written consent form if it finds that the research presents no more than 
minimal risk of harm to subjects and involves no procedures for which written consent is normally 
required outside the research context; or 
(2) The IRB may, for some or all subjects, find that the requirements in 50.24 of this chapter for an exception 
from informed consent for emergency research are met. 
  24  Contains Nonbinding Recommendations 
 
written informed consent is required, the use of electronic, including digital, signatures are permitted 
under FDAs regulations, provided it is in compliance with applicable regulations.45 
In the event that an IRB waives the requirement for documentation of informed consent (under 21 CFR 
56.109(c)(1)), FDA recommends that the elements of informed consent be reviewed verbally with the 
subject or the subjects LAR.  Additionally, the IRB may require the investigator to provide subjects with 
a written statement regarding the clinical investigation (21 CFR 56.109(d)).  See section III. E.2, 
Alternative Methods of Obtaining Informed Consent below for additional information regarding 
documentation of consent.  FDA recommends that when an IRB waives the documentation requirement 
for informed consent in circumstances where there is minimal risk of harm under 21 CFR 56.109(c)(1), 
the consent process and discussion be described and noted in subject case histories required to be 
maintained under 21 CFR 312.62(b) or 21 CFR 812.140(a)(3).46 
 
2.  Alternative Methods of Obtaining Informed Consent 
 
Traditionally, informed consent has been obtained and documented in a face-to-face interview using 
paper consent forms.  Technologies are available that may serve as an alternative to the paper consent 
form in the informed consent process.47  Parties interested in pursuing alternative methods of obtaining 
informed consent should discuss their plan with their IRB and are welcome to contact FDA as needed for 
advice.48 
 
Even in the context of paper consent forms, there may be certain circumstances when an alternative to a 
face-to-face consent discussion may be appropriate.  For example, such an alternative may be appropriate 
 
45 See 21 CFR part 11, Electronic Records; Electronic Signatures and FDA guidance entitled, Guidance for 
Industry Part 11, Electronic Records; Electronic Signatures  Scope and Application, available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/part-11-electronic-records-
electronic-signatures-scope-and-application. 
46 Documentation requirements related to emergency research, as mentioned in 21 CFR 56.109(c)(2), can be found 
in 21 CFR 50.24.  Discussion of these studies is in a separate guidance, Guidance for Institutional Review Boards, 
Clinical Investigators, and Sponsors; Exception from Informed Consent Requirements for Emergency Research, 
available at https://www.fda.gov/regulatory-information/search-fda-guidance-documents/exception-informed-
consent-requirements-emergency-research. 
47 For additional information on alternative methods of obtaining informed consent, please see Guidance for 
Institutional Review Boards, Investigators, and Sponsors, Use of Electronic Informed Consent in Clinical 
Investigations, available at https://www.fda.gov/regulatory-information/search-fda-guidance-documents/use-
electronic-informed-consent-clinical-investigations-questions-and-answers, and FDAs MyStudies Application (App) 
at https://www.fda.gov/drugs/science-and-research-drugs/covid-mystudies-application-app. 
48 Questions related to alternative methods of obtaining informed consent can be directed to the Office of Clinical 
Policy at gcpquestions@fda.hhs.gov. 
  25  Contains Nonbinding Recommendations 
 
when the subject or the subjects LAR is unable to visit the investigational site to sign the consent form, 
or if the screening procedures for the clinical investigation require prior activity, such as fasting, that 
requires consent but does not require a visit to the investigational site.49  When written documentation of 
informed consent is required, informed consent cannot be obtained and documented by oral 
communication through the telephone alone. 
Methods other than a face-to-face consent discussion may be acceptable if those methods allow for an 
adequate exchange of information and documentation, and a method to ensure that the signer of the 
consent form is the person who plans to enroll as a subject in the clinical investigation or is the LAR of 
the subject.  For example, the consent form may be sent to the subject or the subjects LAR by facsimile 
or e-mail, and the consent discussion may then be conducted by telephone/videoconference when the 
subject or subjects LAR can access the consent form during the discussion.  After the consent discussion, 
the subject or the subjects LAR can manually or electronically sign and date the consent form and return 
the document to the clinical investigator through a secure electronic method, such as by scanning the 
consent form and returning it through a secure e-mail account, or by posting it to a secure internet 
address.  Alternatively, the subject may bring the signed and dated consent form to their next visit to the 
clinical site or mail it to the clinical investigator.  The signed document must be maintained as part of the 
subjects case history required under 21 CFR 312.62(b) and 812.140(a)(3).  In addition, the person 
signing the consent form must receive a copy of the consent form (21 CFR 50.27(a)).  Although FDA 
regulations do not require the subjects copy to be a signed copy, FDA recommends that a copy of the 
signed consent form be provided (see section III.E.3, Requirement for Dating Consent Form).50  In 
situations in which the signed document cannot be retrieved for filing in the study records (e.g., because 
the subject is in strict isolation due to a highly transmissible infectious disease), and electronic consent is 
not available, it is acceptable to retain for the study records a photographic image of the signed consent 
form along with an attestation by the person entering the photograph into the study records that states how 
the photograph was obtained and that it is a photograph of the informed consent form signed by the 
subject. 
 
For studies involving no more than minimal risk, and no procedures for which written consent is normally 
required outside the research context, oral consent from a subject or a subjects LAR is permissible under 
21 CFR 56.109(c).  When oral consent is used, FDA recommends that the consent process and discussion 
 
49 See Guidance for Institutional Review Boards and Clinical Investigators: Information Sheet  Screening Tests 
Prior to Study Enrollment, available at https://www.fda.gov/regulatory-information/search-fda-guidance-
documents/screening-tests-prior-study-
enrollment#:~:text=While%20an%20investigator%20may%20discuss%20availability%20of%20studies,eligibility%20
for%20research%2C%20including%20withdrawal%20from%20medication%20%28wash-out%29. 
50 See FDAs guidance E6(R2) Good Clinical Practice: Integrated Addendum to ICH E6(R1) Section 4.8.11; available 
at https://www.fda.gov/regulatory-information/search-fda-guidance-documents/e6r2-good-clinical-practice-
integrated-addendum-ich-e6r1. 
  26  Contains Nonbinding Recommendations 
 
be described and noted in subject case histories required to maintained under 21 CFR 312.62(b) or 21 
CFR 812.140(a)(3). 
 
3.  Requirement for Dating Consent Form 
 
In addition to signing the consent form, the subject or the subjects LAR must enter the date of signature 
on the form (21 CFR 50.27(a)) to allow confirmation that the subject or the subjects LAR provided 
consent prior to participation in the clinical investigation, as required by 21 CFR 50.20.  In those cases 
where the subject provides consent on the same day51 that they begin participation in the clinical 
investigation, the subject's case history must document that the subject provided consent prior to 
participation in the research for studies conducted under an IND or IDE, (312.62(b) and 812.140(a)(3)), 
and the subjects case history should contain the signed and dated consent form.  Although FDA 
regulations do not require the subject's copy to be a signed copy, FDA recommends that a copy of the 
signed consent form be provided.  
 
4.  Forms for Documentation of Informed Consent 
 
Under 21 CFR 50.27: 
 
(b) Except as provided in  56.109(c), the consent form may be either of the following: 
 
(1) A written consent document that embodies the elements of informed consent required by  
50.25.  This form may be read to the subject or the subject's legally authorized representative, 
but, in any event, the investigator shall give either the subject or the representative adequate 
opportunity to read it before it is signed. 
 
(2) A short form written consent document stating that the elements of informed consent required 
by  50.25 have been presented orally to the subject or the subject's legally authorized 
representative.  When this method is used, there shall be a witness to the oral presentation.  
Also, the IRB shall approve a written summary of what is to be said to the subject or the 
representative.  Only the short form itself is to be signed by the subject or the representative.  
However, the witness shall sign both the short form and a copy of the summary, and the 
 
51 Prospective subjects should have sufficient opportunity and time to consider enrollment in the research, such 
that coercion and undue influence are minimized.  See section III.A.2, Coercion and Undue Influence. 
  27  Contains Nonbinding Recommendations 
 
person actually obtaining the consent shall sign a copy of the summary.  A copy of the 
summary shall be given to the subject or the representative, in addition to a copy of the short 
form. 
 
The regulations provide for obtaining written informed consent by two different methods:  a long form 
that embodies all the elements of informed consent (see 21 CFR 50.25), or a short form that states that the 
elements of informed consent have been presented orally to the subject or the subjects LAR. 
 
a.  Long Form 
 
As stated above, the long form must incorporate all the elements of informed consent as required under 21 
CFR 50.25.  When the long form is used, a copy must be provided to the person signing the form, that is, 
the subject or the subjects LAR (21 CFR 50.27(a)). 
 
b.  Short Form 
 
An IRB may approve a short form to be used in appropriate situations where the elements of informed 
consent required by 21 CFR 50.25 are presented orally to the subject or the subjects LAR (21 CFR 
50.27(b)(2)).  For example, IRBs may consider approving the use of a short form in situations where the 
subject or the subjects LAR is unable to read due to low literacy or visual impairment.52 
 
When the short form is used, the IRB is required to approve a written summary of the information to be 
presented orally (21 CFR 50.27(b)(2)).  The information presented orally should be as thorough as the 
 
52 For additional information see Frequently Asked Question #6, What should be considered when enrolling 
subjects with low literacy and numeracy? and Frequently Asked Question #7, What should be considered when 
enrolling subjects with physical or sensory disabilities?  In addition, for information on enrolling individuals with 
limited English proficiency see Frequently Asked Question #3, What are some considerations for enrolling non-
English speaking subjects?, Frequently Asked Question #4, What process should be followed when it is expected 
that subjects who do not understand English will be enrolled?, and Frequently Asked Question #5, What process 
should be followed when the enrollment of subjects who do not understand English, or who are limited English 
proficient, is not expected? 
  28  Contains Nonbinding Recommendations 
 
information contained in the long form.53  A copy of the short form and the written summary must be 
given to the person signing the form (that is, the subject or the subjects LAR) (21 CFR 50.27(b)(2)). 
 
Use of the short form requires that there be a witness to the oral presentation of information to the subject 
or the subjects LAR (21 CFR 50.27(b)(2)).  FDA recommends that an impartial third party not otherwise 
connected with the clinical investigation (for example, clinical staff not involved in the research, a patient 
advocate or an independent interpreter) serve as the witness.  The witness must be present physically or 
by some other means, for example, by phone or video conference, during the oral presentation, not just 
the signing of the consent form (21 CFR 50.27(b)(2)).  The purpose of the witness is generally to attest to 
the voluntariness of the subjects consent and the adequacy of the consent process by ensuring that the 
information was accurately conveyed and that the subjects questions were answered. 
 
The subject or the subjects LAR signs and dates only the short form (21 CFR 50.27(a) and (b)(2)).  The 
witness must sign both the short form and the summary, and the person obtaining consent must sign the 
summary (21 CFR 50.27(b)(2)).  Due to the additional requirements of having a witness and providing a 
written summary of the consent discussion, use of the short form may not ease or expedite the consent 
process. 
 
IV.  RESPONSIBILITIES FOR INFORMED CONSENT 
 
IRBs, clinical investigators, and sponsors share responsibility for ensuring that the informed consent form 
and process is adequate and meets FDA's regulatory requirements.  The regulatory requirements represent 
the minimum information to be provided to prospective subjects for informed consent.  The consent form 
should also incorporate any additional information that may affect subjects rights and welfare or 
willingness to participate in the clinical research.  For example, information about certain financial 
relationships and interests may be important to the subject (see section IV.A.1, "Review of All Informed 
Consent Materials" and section IV.B.2, "Financial Relationships and Interests"). 
 
 
53 See the response to Comment 52 in the preamble to the 1981 final rule issuing regulations for the protection of 
human subjects (46 FR 8942, January 27, 1981); https://www.fda.gov/science-research/clinical-trials-and-human-
subject-protection/protection-human-subjects-informed-consent: The fact that a short form is used to document 
informed consent does not mean that the subject will get less information than if handed a long, detailed written 
document...All the form provides [whether long or short] is evidence that the information required by 50.25 has 
been provided to a prospective subject. 
  29  Contains Nonbinding Recommendations 
 
A.  The IRB 
 
FDA requires that an IRB review and have authority to approve, require modifications in (to secure 
approval), or disapprove all research activities covered by the IRB regulations (21 CFR 56.109(a)).  A 
critical part of this responsibility is for the IRB to review and approve a consent form that complies with 
applicable regulatory requirements at 21 CFR part 50 and to help ensure there is an adequate informed 
consent process that protects the rights and welfare of subjects participating in clinical investigations (21 
CFR 56.109 and 56.111).  Below are specific areas that IRBs should consider: 
 
1.  Review of All Informed Consent Materials 
 
IRBs must review all materials used in the informed consent process (see 21 CFR 56.109(a)-(b) and 
56.111(a)(4)-(5)).54  This includes recruitment materials55, such as advertisements, and information 
provided in addition to the informed consent form (for example, a chart explaining what to expect at each 
study visit or a document explaining the costs to subjects).  The IRBs review is to ensure that 
information given to subjects as part of the consent process is in accordance with the requirements of 21 
CFR part 50 (see 21 CFR 56.109 and 56.111(a)(4)-(5)). 
 
When reviewing clinical investigations, IRBs must ensure that the consent process minimizes the 
possibility of coercion and undue influence (21 CFR 50.20 and 56.111(a)(4)).  When a clinical 
 
54 IRBs are not required under 21 CFR part 56 to review stand-alone HIPAA authorizations, so long as an IRBs 
written procedures, adopted pursuant to 21 CFR 56.108(a), do not require such review and approval.  See page 8 
of FDAs Guidance for Industry IRB Review of Stand-Alone HIPAA Authorizations Under FDA Regulations 
(available at https://www.fda.gov/regulatory-information/search-fda-guidance-documents/irb-review-stand-
alone-hipaa-authorizations-under-fda-regulations). 
55 As described in the FDA Information Sheet Recruiting Study Subjects (available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/recruiting-study-subjects), FDA 
considers advertising, including but not necessarily limited to newspaper, radio, TV, bulletin boards, posters, flyers, 
and internet postings, to be part of the consent process.  However, FDA does not consider listings of basic 
information about clinical investigations to be advertising for recruitment.  We consider basic information to be 
information such as the title of the clinical investigation, purpose of the clinical investigation, protocol summary, 
basic eligibility criteria, investigational site locations, and how to contact the site for further information.  An 
example of a basic information listing is the National Institutes of Health clinical trial registry 
(https://clinicaltrials.gov/), where many FDA-regulated clinical investigations are required to be registered.  Any 
posting about a clinical investigation where the format limits the information provided to basic information does 
not need to be reviewed by the IRB.  However, a posting that provides more than basic information should be 
submitted for IRB review. 
  30  Contains Nonbinding Recommendations 
 
investigation involves subjects who are likely to be vulnerable to coercion or undue influence, IRBs must 
determine that additional safeguards have been included in the clinical investigation to protect their rights 
and welfare (21 CFR 56.111(b)).  In the event an IRB regularly reviews clinical investigations involving 
vulnerable subject populations, for such clinical investigations, the IRB membership should include 
individuals with knowledge about and/or experience working with such subjects, in order to provide 
expertise and identify techniques for obtaining their informed consent.56 
 
The IRB has the authority to require that subjects receive information in addition to what 21 CFR 50.25 
requires, if in the judgment of the IRB, the information would meaningfully add to the protection of the 
rights and welfare of the subjects (21 CFR 56.109(b)).  For example, the IRB may determine that local 
circumstances necessitate the inclusion of additional information relevant to the informed consent process 
for prospective subjects from that particular community. 
 
HHS recommends that IRBs consider whether subjects should be informed of any financial relationships 
or interests that are associated with the clinical investigation, such as payments for services, equity 
interests or intellectual property rights.57  As indicated in the HHS guidance, some conflicting financial 
interests in the clinical investigation may affect the rights and welfare of subjects, and IRBs should 
consider approaches to assure subjects are adequately protected, including providing subjects with 
information about the financial relationships and interests.  IRBs should determine whether subjects 
should be provided with information regarding the source of funding, funding arrangements, financial 
interests of parties involved in the clinical investigation, and any financial interest management 
techniques applied.  The IRB should consider the kind, amount, and level of detail of information to be 
provided to subjects. 
 
 
56 For additional information see Frequently Asked Question #6, What are some considerations for enrolling 
subjects with low literacy and numeracy?; Frequently Asked Question #7, What are some considerations for 
enrolling physically challenged subjects?; and Frequently Asked Question #8, What are some considerations for 
enrolling subjects with impaired consent capacity? 
57 This topic is addressed in the HHS guidance document, Financial Relationships and Interests in Research 
Involving Human Subjects:  Guidance for Human Subject Protection.  This guidance, which applies to FDA-
regulated clinical investigations as well as human subjects research conducted or supported by HHS, is available at 
https://www.hhs.gov/ohrp/regulations-and-policy/guidance/financial-conflict-of-interest/index.html. 
  31  Contains Nonbinding Recommendations 
 
a.  Adequacy and Appropriateness of Wording 
 
The IRB has the authority and responsibility to require that information given to subjects as part of 
informed consent be in accordance with 21 CFR 50.25.58  In order to approve the research, the IRB must 
determine that informed consent will be obtained in accordance with the informed consent regulations (21 
CFR 56.111(a)(4)). 
 
Investigators must use an IRB-approved written consent form when documenting informed consent, in 
accordance with 21 CFR 50.27, except as provided in 21 CFR 56.109(c).  Thus, the IRB should review 
the adequacy and appropriateness of all wording in the consent materials, as well as the overall length and 
presentation of information.  Consent forms that are long, complex, legalistic, and have a high reading 
level may overwhelm prospective subjects and may inhibit reading of the full document and 
understanding of the relevant information. 
 
The IRB should ensure that technical and scientific concepts and terms are explained, or common terms 
substituted, so that the anticipated subject population can understand all provided information (see 21 
CFR 50.20).59  Pictures, diagrams, or other visual aids may be used to improve understanding of medical 
terms or how an investigational product functions.  IRBs may wish to evaluate, through subject 
discussions, how well the consent materials communicate critical information.  Additional guidance on 
the requirements at 21 CFR 50.20 can be found in section III.A, General Requirements for Informed 
Consent above. 
 
b.  Use of Standardized Language 
 
Institutions may develop standard language or a standard format to use in portions of all consent forms 
(for example, for those elements that deal with confidentiality, compensation, answers to questions, and 
the voluntary nature of participation) to meet certain FDA regulatory requirements, as well as institutional 
and other Federal, State, or local requirements. 
 
 
58 See 21 CFR 56.109(b). 
59 Various strategies exist to improve communication with patients, for example, see Doak CC, Doak LG, Friedell 
GH, Meade CD. Improving comprehension for cancer patients with low literacy skills: strategies for clinicians. CA 
Cancer J Clin. 1998 May-Jun;48(3):151-62. doi: 10.3322/canjclin.48.3.151. PMID: 9594918. 
  32  Contains Nonbinding Recommendations 
 
2.  Review of the Consent Process 
 
The investigator should notify the IRB of the consent process to be used.  The process may be described 
in the protocol, or the investigator may provide a brief document describing the process to be used.  The 
materials and procedures used for subject recruitment, which typically include advertisements, must be 
reviewed and approved by the IRB to ensure that these materials are appropriate, as described in section 
IV.A.1, Review of All Informed Consent Materials (see 21 CFR 56.109(b) and 56.111(a)(4)).60  The 
IRB must determine that investigators will seek consent from prospective subjects under circumstances 
that minimize the possibility of coercion and undue influence (21 CFR 50.20 and 56.111(a)(4)).  FDA 
considers this to include ensuring that the consent process described by the investigator allows sufficient 
time for prospective subjects to consider the information, provides time and opportunity for the subjects 
to ask questions and have those questions answered, and allows time and opportunity for the subjects to 
consider fully whether to participate. 
 
To approve a clinical investigation, the IRB must find that informed consent will be sought from each 
prospective subject or the subject's LAR and that informed consent will be appropriately documented, in 
accordance with and to the extent required by 21 CFR part 50 (21 CFR 56.111(a)(4) and (5)).  FDA 
recommends that the IRB inquire as to who will conduct the consent discussion and what procedures will 
be followed.  If procedures other than a face-to-face consent discussion are proposed, such as by 
telephone, the IRB should consider whether the procedures will provide effective communication and 
accomplish the goals of the informed consent process.  Alternative procedures may be of special concern 
when the clinical investigation involves complex procedures or when risks may be difficult to 
comprehend. 
 
FDA regulations authorize the IRB to observe or have a third party observe the consent process, as well 
as the research (21 CFR 56.109(f)).  IRBs should consider using this authority when it may be 
appropriate61 or enhance the protection provided to subjects (for example, when the investigator is also 
 
60 For further information, see the FDA Information Sheet Recruiting Study Subjects, available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/recruiting-study-subjects. 
61 In the "Institutional Review Board; Report and Recommendations of the National Commission for the Protection 
of Human Subjects of Biomedical and Behavioral Research, published in the Federal Register, November 30, 1978 
(43 FR 56174), the Commission stated:  Observation of the consent process or conduct of research is both a 
difficult and delicate task.  The designation of staff or members of the IRB to observe research activities can 
impose a substantial strain on the limited resources of the IRB.  Further, such observation may intrude on 
confidential relationships or the privacy of individual subjects.  IRBs should take these factors into account when 
determining appropriate means for continuing review of a protocol, and alternatives such as investigator reporting 
requirements should be considered.  However, certain research will warrant observation to assure the protection 
of subjects, and in such cases IRBs have an obligation to take suitable measures.  Id. at 56179. 
  33  Contains Nonbinding Recommendations 
 
the treating physician for a prospective subject, when the person conducting the consent interview is 
relatively inexperienced, or when the clinical investigation involves vulnerable subjects).  In addition to 
observing a sample of consent discussions, the IRB could interview subjects to assess the consent process 
and evaluate the subjects understanding of the clinical investigation. 
 
3.  IRB Review of Updated Informed Consent Documents  
 
All information given to subjects as part of the consent process is to be reviewed and approved by the 
IRB (21 CFR 56.109(a)-(b) and 56.111(a)(4)-(5)).62  During the clinical investigation, new information 
about the research or changes to the clinical investigation may arise that affect the rights or welfare of 
subjects.  FDA recommends that IRBs have procedures in place for the timely, efficient, and effective 
review of such new information or changes.  This would include procedures for the clinical investigator 
and/or sponsor to notify the IRB of any significant new findings that arise during the clinical investigation 
relevant to a subjects decision to continue participation (see section III.C.5, Providing Significant New 
Findings to Subjects, and Frequently Asked Question #16).  When new information or changes in the 
clinical investigation warrant revisions of the consent form (and any accompanying changes to the 
protocol), such revisions must be reviewed and approved by the IRB before the revisions are initiated, 
except when necessary to eliminate apparent immediate hazards to subjects (21 CFR 56.108(a)(3)-(4)). 
Some changes may be reviewed and approved by expedited means, as provided for by 21 CFR 56.110.  
For example, an IRB may decide expedited review is appropriate for changes to the consent form that 
reflect minor changes in the protocol or recruitment plan (e.g., new advertising for subjects following 
initiation of the clinical investigation when the advertisement incorporates wording from the approved 
consent form).  When expedited review is used, if the IRB reviewer is unsure whether the change 
qualifies for expedited review under 21 CFR 56.110(b), FDA recommends that the reviewer (if other than 
the IRB chair) consult with the IRB chair.  If doubts persist as to whether the change qualifies for 
expedited review, then the change should be reviewed at a convened meeting of the IRB.63 
 
Administrative changes, such as the correction of typographical and spelling errors, and changes in 
telephone numbers, may be submitted to the IRB at any time, including during continuing review, and do 
not require formal review and approval.  Although such changes do not need IRB review, updated 
 
62 This would include all addenda to the consent form and other materials used in the consent process. 
63 As indicated at section IV.B, when new information is added to the consent form that might affect the 
willingness of already enrolled and actively participating subjects to continue in the clinical investigation, the IRB 
should determine the need to inform the previously enrolled subjects of the new information and determine their 
willingness to continue in the research.   
  34  Contains Nonbinding Recommendations 
 
versions of the consent form should be sent to the IRB so that they have current copies of the informed 
consent form on file.64 
 
4.  Identification of Revised Consent Forms 
 
The IRB should ensure that there is a way to identify a revised consent form so that continued use of a 
previously approved version does not occur.  While not required by FDA regulations, the use of date 
stamps is one possible mechanism for ensuring use of the most recently approved version of the consent 
form.   
 
B.  The Clinical Investigator 
 
The clinical investigator is responsible for protecting the rights, safety, and welfare of subjects during a 
clinical investigation, and for ensuring that, unless an exception applies, legally effective informed 
consent is obtained from each subject or the subjects LAR before that subject takes part in the clinical 
investigation (see 21 CFR 50.20(a), 312.60, and 812.100).  Legally effective informed consent includes 
meeting all applicable Federal, State, and local laws that require additional information in the informed 
consent form beyond what FDA regulations require.  Sponsors and investigators may wish to seek legal 
guidance regarding specific local consent requirements applicable to their research. 
 
The clinical investigator should notify the IRB regarding the consent process, including who (e.g., the 
investigator or another study team member) will conduct the consent discussion.  Any information that 
will be given to subjects to review and discuss as part of informed consent must be submitted to the IRB 
for review and approval (21 CFR 56.109(a)-(b) and 56.111(a)(4)-(5)).  An investigator may not begin the 
informed consent process with prospective subjects until the IRB reviews and approves the clinical 
investigation, consent form, and any other information to be given to subjects as part of the consent 
process (21 CFR 50.20, 50.27, and 56.109). 
 
The clinical investigators institution may have standard language or a standard format for consent forms 
(for example, for those elements that deal with confidentiality, compensation, answers to questions, and 
the voluntary nature of participation).  FDA recognizes that investigators may also need to identify and 
 
64 See section IV.A.4 for guidance regarding identification of the most up-to-date version of the informed consent 
form. 
  35  Contains Nonbinding Recommendations 
 
meet institutional requirements and incorporate them into the consent form for the IRBs initial review of 
the clinical investigation. 
 
During the clinical investigation, the investigator may need to revise the consent form to address new 
information that might arise during the conduct of the trial, such as a change to the protocol or new safety 
information.  The investigator will need to obtain IRB review and approval of the revised consent form 
(21 CFR 50.27 and 56.109).  In addition, because the consent form is being modified to reflect new 
information that might affect the willingness of already enrolled and actively participating subjects to 
continue in the clinical investigation, the IRB should determine the need to inform the previously enrolled 
subjects of the new information and determine their willingness to continue in the research (see 
Frequently Asked Questions #16). 
 
Any new information that is part of the consent process must be reviewed and approved by the IRB as a 
change in approved research before it is initiated, except where necessary to eliminate apparent 
immediate hazards to the subject (see 21 CFR 56.108(a)(4)).  In the rare event that urgent safety 
information is provided to the subject prior to IRB approval, the IRB should promptly be notified of both 
the safety issue and the notification of subjects. 
 
Below are specific areas for consideration by the clinical investigator: 
 
1.  Delegation of Consent Discussion 
 
FDA regulations require that the investigator obtain the legally effective informed consent of subjects (21 
CFR 50.20, 312.60 and 812.100).  If the investigator delegates this responsibility, FDA expects that the 
individual to whom the responsibility is delegated be qualified by education, training, and experience to 
perform this activity.  The individual obtaining informed consent should be knowledgeable about the 
clinical investigation and have the appropriate training and credentials to be able to address any questions 
or concerns the subject may have about the study and/or alternative procedures or courses of treatment, if 
any, that might be advantageous to the subject.  The investigator should have a detailed plan for the 
supervision and training of staff, and oversight of the clinical investigation, including the informed 
consent process.65  Even when a task is delegated to another individual, the investigator remains 
 
65 See FDAs Guidance for Industry Investigator Responsibilities  Protecting the Rights, Safety, and Welfare of 
Study Subjects at https://www.fda.gov/regulatory-information/search-fda-guidance-documents/investigator-
responsibilities-protecting-rights-safety-and-welfare-study-subjects. 
  36  Contains Nonbinding Recommendations 
 
responsible for ensuring that legally effective informed consent is obtained for all subjects in accordance 
with 21 CFR part 50. 
 
2.  Financial Relationships and Interests 
 
The clinical investigator should consider whether information related to financial relationships or interests 
should be provided to subjects.66  Clinical investigators should consider the potential effects that a 
financial relationship might have on the clinical investigation or on interactions with subjects.  When 
there are financial relationships or interests, clinical investigators should consider the following actions: 
  Including information in the informed consent form, such as: 
  The source of funding and funding arrangements for the conduct and review of the 
clinical investigation, or 
  Information about a financial arrangement or interest (e.g., stock in the study sponsor, 
patent on the investigational product) of an institution or an investigator and how it is 
being managed. 
 
  Using special measures to modify the informed consent process when a potential or actual financial 
conflict exists, such as: 
  Having another individual who does not have a potential or actual conflict of interest 
involved in the consent process, especially when a potential or actual conflict of interest 
could influence the tone, presentation, or type of information presented during the 
consent process. 
  Using independent monitoring of the consent process. 
Although the clinical investigator should consider these issues regarding financial relationships and 
interests, IRBs have the final responsibility of determining whether subjects should be provided with 
information regarding the source of funding, funding arrangements, or financial interests of parties 
involved in the clinical investigation as part of the informed consent process (see 21 CFR 56.109 and 
56.111(a)(4)-(5)). 
 
 
66 See the HHS guidance document, Financial Relationships and Interests in Research Involving Human Subjects: 
Guidance for Human Subject Protection,  available at https://www.hhs.gov/ohrp/regulations-and-
policy/guidance/financial-conflict-of-interest/index.html#. 
  37  Contains Nonbinding Recommendations 
 
C.  The Sponsor 
 
Sponsors often provide clinical investigators with a model consent form that may be adapted by the 
clinical investigator to meet local needs.  When the consent form for studies that require an IND or IDE 
application is submitted to FDA for review, FDAs comments are generally directed to the sponsor (see 
section IV.D.1, Investigational New Drugs and Biologics, and section IV.D.2, Investigational Medical 
Devices).  The sponsor should promptly provide the clinical investigator with any necessary 
modifications required to satisfy the regulations at 21 CFR 50.25 so that changes can be made to the 
consent forms.  A modified model consent form reflecting the changes may be used to convey the 
necessary edits.  Because the clinical investigator must receive IRB approval before starting the clinical 
investigation (see 21 CFR 312.66 and 21 CFR 812.110(a)), the sponsor should work closely with the 
clinical investigator to make certain the modified consent form is reviewed and approved by the IRB.  
The clinical investigator should provide the sponsor with a copy of the consent form approved by the 
IRB. 
Below are specific areas for consideration by the sponsor: 
 
1.  Considerations for Multicenter Clinical Investigations 
 
For multicenter clinical investigations, changes may need to be made to the consent form to address local 
and institutional requirements.  For multicenter clinical investigations reviewed by more than one IRB, 
when local IRB review results in substantive modifications to the consent form, i.e., changes that affect 
the rights, safety, or welfare of the subjects, FDA expects the sponsor to share the revisions with all 
investigators and their IRBs.  In this situation it may be more efficient to share the changes with the sites 
using a modified model consent form, when appropriate.  If the multicenter clinical investigation has a 
central IRB cooperating with local IRBs or human research protection offices, the revisions should be 
forwarded to the central IRB.67  Alternatively, local issues may be addressed by the central IRB 
depending on the review agreement between the local IRB(s) and central IRB.  Note that for medical 
 
67 See Guidance for Industry, Using a Centralized IRB Review Process in Multicenter Clinical Trials, available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/using-centralized-irb-review-
process-multicenter-clinical-trials. 
  38  Contains Nonbinding Recommendations 
 
device studies that require submission of an IDE application, such changes must be submitted to FDA.68, 
69 
 
2.  Sponsor Personnel 
 
Sponsor personnel (usually a field engineer) may be present during the procedure and/or follow-up visits 
for some medical device studies.  These individuals may provide technical support and/or record study-
related information for the test article.  If sponsor personnel will be present during the procedure or 
follow-up, or if the activities of the sponsor personnel directly affect the subject, those activities should 
also be described in the informed consent form.70 
 
D.  The FDA 
 
FDAs regulations for drug (including biologic) and device investigations have different requirements for 
the submission of informed consent materials (see sections IV.D.1, Investigational New Drugs and 
Biologics, and IV.D.2, Investigational Medical Devices, for additional information).  Sponsors are not 
required to submit informed consent materials to FDA for all clinical investigations (see, for example, 21 
CFR 312.2(b) and 21 CFR 812.2(b) and (c)); however, FDA may require that they be submitted in some 
cases as discussed below. 
 
Generally, when informed consent materials are submitted, FDA reviewers assess the adequacy of the 
consent form by considering its communication of reasonably foreseeable risks or discomforts to the 
 
68 See 21 CFR 812.35(a). 
69 The 2018 Common Rule requires that any institution located in the United States that is engaged in cooperative 
research conducted or supported by a Federal Department or Agency must rely upon approval by a single IRB for 
that portion of the research that is conducted in the United States, unless the research is not subject to the 
provision (45 CFR 46.114(b)). The compliance date for research subject to this provision was January 20, 2020.  On 
September 28, 2022, FDA issued a proposed rule to harmonize with this requirement to the extent practicable and 
consistent with statutory provisions (see https://www.federalregister.gov/documents/2022/09/28/2022-
21089/institutional-review-boards-cooperative-research).  The January 19, 2017, final rule revising the Common 
Rule is available at https://www.hhs.gov/ohrp/regulations-and-policy/regulations/finalized-revisions-common-
rule/index.html. 
70 See Guidance for Industry: Investigator Responsibilities  Protecting the Rights, Safety, and Welfare of Study 
Subjects, available at https://www.fda.gov/regulatory-information/search-fda-guidance-documents/investigator-
responsibilities-protecting-rights-safety-and-welfare-study-subjects. 
  39  Contains Nonbinding Recommendations 
 
subject and other elements required by 21 CFR 50.25.  In some situations, FDA may find a consent form 
to be misleading, inaccurate, or incomplete in a way that would make informed consent inadequate and 
noncompliant with 21 CFR part 50.  In these cases, FDA may require that specific revisions be made to 
address the concern(s) before the clinical investigation can proceed (21 CFR 312.42 and 812.30). 
 
FDA's review of the consent form as part of an IND or IDE application submission does not substitute for 
the responsibility or authority of the IRB to review and approve the consent form and consent process as a 
condition for the clinical investigation to begin (21 CFR 56.103(a)).  IRBs are responsible for ensuring 
the adequacy of the information in the consent form and may require modification as appropriate (21 CFR 
56.109(a)-(b)). 
 
Below are specific areas FDA considers in its review of the consent form: 
 
1.  Investigational New Drugs and Biologics71  
 
The IND regulations (21 CFR part 312) do not specifically require submission to FDA of the consent 
form with the IND.  However, if FDA determines that review of the consent form is necessary to make 
the determination of whether the clinical investigation may safely proceed, the Agency will request that 
the sponsor submit the consent form for review under 21 CFR 312.23(a)(11). 
 
As a general matter, FDA will review the informed consent form for treatment INDs and treatment 
protocols (21 CFR part 312, subpart I) and INDs for studies conducted under the Exception From 
Informed Consent Requirements for Emergency Research (21 CFR 50.24) for consistency with 21 CFR 
50.25 (see 21 CFR 50.24(a)(6)). 
 
For other clinical investigations of drugs, FDA often considers the following factors in determining 
whether to require submission and review of the consent form: 
  Nonclinical studies submitted in support of the first administration of a drug in humans have 
identified an unusual toxicity. 
  Unusual known toxicity is associated with the investigational drug, the drug class to which the 
drug belongs, or with a different drug with characteristics similar to those of the study drug. 
 
71 For the purposes of this document, unless otherwise specified, all references to drugs or drug products 
include human drug products and biological products that are also drugs. 
  40  Contains Nonbinding Recommendations 
 
  The study subject population is particularly vulnerable. 
  The study design is unusual for the therapeutic class. 
  The clinical investigation is a postmarketing safety clinical trial, required under section 505(o) of 
the FD&C Act to assess a serious risk. 
  The clinical investigation has significant potential for serious risk to human subjects. 
  The clinical investigation involves asking subjects to forgo or delay effective treatment that is 
known to decrease long-term mortality or irreversible morbidity. 
  FDA has other confidential or proprietary information not available to an IRB that affects the 
assessment of whether the informed consent form adequately addresses risks. 
 
After reviewing the consent materials, if the FDA review divisions have specific concerns about the 
adequacy or compliance of the consent materials with 21 CFR part 50, details about these concerns 
normally will be conveyed to the sponsor in writing.  In rare circumstances, FDA may find a consent form 
to be misleading, inaccurate, or incomplete in a way that makes informed consent inadequate and 
noncompliant with 21 CFR part 50 to the extent that subjects would be exposed to an unreasonable and 
significant risk of illness or injury.  In these cases, FDA may require that specific revisions be made to 
address the concern(s) before the clinical investigation can proceed (21 CFR 312.42). 
 
2.  Investigational Medical Devices 
 
For clinical investigations of medical devices for which an IDE application is required to be submitted to 
FDA, the sponsor must include in the application copies of all forms and informational materials that will 
be provided to subjects to obtain informed consent (21 CFR 812.20(b)(11)).  FDA reviews the consent 
form to ensure that it conforms to the requirements of 21 CFR part 50.  After review, FDA may send the 
sponsor a letter citing deficiencies regarding the consent form (21 CFR 812.30(a) and (b)(4)).  The 
clinical investigation may not begin until the sponsor has corrected these deficiencies (21 CFR 812.30(a) 
and 812.42).  In the event an IRB requires substantive changes to the informed consent document after 
IDE approval, i.e., changes that affect the rights, safety, or welfare of the subjects, the sponsor must 
submit the revised informed consent document to FDA for its review and approval prior to implementing 
the changes to the document (see 21 CFR 812.35(a)).     
 
  41  Contains Nonbinding Recommendations 
 
V.  FREQUENTLY ASKED QUESTIONS 
 
This section of the guidance document is intended to provide answers to frequently asked questions about 
FDAs regulations for the protection of human subjects.  The numbers assigned to the questions are 
intended for ease of reference and do not represent the frequency with which these questions are asked. 
 
1.  What are some considerations for enrolling a child72 into a clinical investigation? 
 
FDA regulations provide additional safeguards for children enrolled in clinical investigations, as 
described in 21 CFR part 50, subpart D.73  If a child is to be enrolled in a clinical investigation, parental 
or guardian permission must be obtained in accordance with the requirements for informed consent in 21 
CFR part 50 (21 CFR 50.55(e)) 74 and be documented in accordance with 21 CFR 50.27 (21 CFR 
50.55(f)).  When appropriate, the assent of the child also must be obtained (see 21 CFR 50.55(a)-(d)).  As 
with informed consent for adult subjects, the exceptions to informed consent requirements described in 
section III.A.1, Exceptions to Informed Consent, apply to research involving children. 
 
The IRB may determine that the permission of one parent is sufficient for clinical investigations involving 
no greater than minimal risk to children to be conducted under 21 CFR 50.51, or clinical investigations 
involving greater than minimal risk to children but presenting the prospect of direct benefit to individual 
subjects in accordance with 21 CFR 50.52 (21 CFR 50.55(e)(1)). 
For clinical investigations to be conducted in accordance with either 21 CFR 50.53 or 21 CFR 50.54,75 
where permission is to be obtained from parents, the permission of both parents is required unless one 
 
72 For purposes of 21 CFR part 50, the term children means persons who have not attained the legal age for 
consent to treatments or procedures involved in clinical investigations, under the applicable law of the jurisdiction 
in which the clinical investigation will be conducted.  See 21 CFR 50.3(o). 
73 FDA promulgated 21 CFR part 50, subpart D, "Additional Safeguards for Children in Clinical Investigations," as an 
interim rule in April 2001 (see 66 FR 20589, April 24, 2001; https://www.govinfo.gov/content/pkg/FR-2001-04-
24/pdf/01-10008.pdf), and issued a final rule in February 2013 (see 78 FR 12937, February 26, 2013; 
https://www.govinfo.gov/content/pkg/FR-2013-02-26/pdf/2013-04387.pdf). 
74 Note that the waiver of parental permission found in 45 CFR 46.408(c) is not available under FDAs regulations. 
75 21 CFR 50.53 applies to clinical investigations presenting greater than minimal risk and no prospect of direct 
benefit to the individual subjects, but that are likely to yield generalizable knowledge about the subjects disorder 
or condition.  21 CFR 50.54 applies to clinical investigations that do not meet the requirements of 21 CFR 50.51, 
50.52, or 50.53 but present a reasonable opportunity to understand, prevent, or alleviate a serious problem 
affecting the health or welfare of children. 
  42  Contains Nonbinding Recommendations 
 
parent is deceased, unknown, incompetent, or not reasonably available, or when only one parent has legal 
responsibility for the care and custody of the child (21 CFR 50.55(e)(2)).76 
 
The general requirements for informed consent, found in 21 CFR 50.20, 21 CFR 50.25 and 21 CFR 
50.27, apply to parental permission (21 CFR 50.55(e)-(f)).  When obtaining parental permission, in the 
event the parents of a child do not understand English, the parental permission must be obtained and 
documented in language that is understandable to the parents (21 CFR 50.20).  The child who will be 
participating in the research should not be used as an interpreter for the parent, even if the child is fluent 
in English and may be able to assent.  Similarly, if child assent is required, the information given to the 
child should be in language that is understandable to the child. 
 
Assent means a childs affirmative agreement to take part in a clinical investigation, not just the failure 
to object (21 CFR 50.3(n)).  Child assent, when appropriate, and parental (or guardian) permission taken 
together meet the ethical requirement to obtain informed consent.  Absent a waiver of the assent 
requirement (21 CFR 50.55(d)), the IRB must determine that there are adequate provisions for soliciting 
the assent of children when, in the IRBs judgment, the children are capable of providing assent (21 CFR 
50.55(a)).  In deciding whether children are capable of providing assent, the IRB must consider the ages, 
maturity, and psychological state of the children to be involved in the clinical investigation (21 CFR 
50.55(b)).77  A child does not need to fully understand the clinical investigation in order to provide assent, 
provided the child is capable of understanding the interventions and the related procedures.  For example, 
a child may be able to understand and provide assent if the child understands and agrees to the 
interventions and/or procedures in the trial (e.g., drawing a blood sample for a test), even though the child 
may not be capable of understanding a randomized clinical trial. 
 
An IRB may determine that assent is not necessary or may waive the assent requirement in certain 
situations (21 CFR 50.55(c) and (d)).  For example, the assent of children is not a necessary condition for 
proceeding with a clinical investigation if the IRB determines that the intervention or procedure involved 
in the clinical investigation holds out a prospect of direct benefit that is important to the health or well-
being of the children and is available only in the context of the clinical investigation (21 CFR 
50.55(c)(2)).  Also, the IRB may waive the assent requirement for children capable of assenting if the IRB 
finds and documents that the clinical investigation involves no more than minimal risk to the subjects; the 
waiver will not adversely affect the rights and welfare of the subjects; the clinical investigation could not 
practicably be carried out without the waiver; and, when appropriate, the subjects will be provided with 
 
76 For additional discussion on what is meant by not reasonably available, see the Secretarys Advisory 
Committee on Human Research Protections (SACHRP) recommendations at https://www.hhs.gov/ohrp/sachrp-
committee/recommendations/attachment-d-november-13-2018/indes.html. 
77 FDA recognizes that IRBs may adopt procedures setting an age below which children are presumed incapable of 
providing assent. 
  43  Contains Nonbinding Recommendations 
 
additional pertinent information after participation (21 CFR 50.55(d)).  Parental permission requirements 
(to the extent consent is required under 21 CFR part 50) remain in these circumstances. 
 
When the IRB determines that assent is required, it must also determine whether and how assent must be 
documented (21 CFR 50.55(g)).  Some of the same considerations noted above for determining capability 
of children to provide assent should be considered when determining whether assent should be in writing 
or oral. 
 
When a written assent process is appropriate or required by the IRB, FDA does not require the use of a 
written assent form (21 CFR 50.55(g)), but FDA strongly encourages the use of a separate assent form 
that is child-oriented and developmentally appropriate.  A separate assent form does not need to include 
all of the elements of a consent document but should focus on those aspects of the clinical investigation 
that may impact on a childs willingness to participate. 
 
Parental permission and child assent should be viewed as an ongoing process throughout the duration of a 
clinical investigation.  If and when a child who was enrolled in a clinical investigation with parental 
permission reaches the legal age of consent, that subject no longer meets the definition of a child under 21 
CFR 50.3(o), and the investigator should obtain the subjects informed consent under 21 CFR part 50, 
subpart B, prior to performing any further research interventions and/or procedures involving that subject.   
 
In addition,  50.3(o) defines children as persons who have not attained the legal age for consent to 
treatments or procedures involved in clinical investigations, under the applicable law of the jurisdiction in 
which the clinical investigation will be conducted.  However, in some situations, a State may grant 
certain minors of a specific age the right to consent to treatments or procedures on their own behalf.  
These mature minors do not meet the definition of children for purposes of a clinical investigation that 
involves solely those treatments or procedures for which they can give consent outside the research 
context and thus, the requirements of 21 CFR part 50, subpart D, do not apply to the research with respect 
to these minors.  Similarly, minors deemed emancipated by State law, such that they may provide 
consent to treatments and procedures in the clinical setting, also do not meet the definition of children 
under  50.3(o), and the requirements of 21 CFR part 50, subpart D do not apply to the research with 
respect to these emancipated minors.  In these cases, the mature or emancipated minors can consent to 
participation in FDA-regulated research without the need for parental or guardian permission.  For 
example, if a clinical trial is being conducted in a jurisdiction that has laws that explicitly allow a minor 
of a particular age, to consent to receive specific sexual transmitted disease (STD) services in the clinical 
setting, these minors may be able to provide informed consent for participation in a clinical trial of a 
product intended to treat or diagnose an STD. 
 
  44  Contains Nonbinding Recommendations 
 
2.  Are there any additional protections required when enrolling children who are wards of the 
state? 
 
Children who are wards of the state or any other agency, institution, or entity can be included in a clinical 
investigation that is approved under 21 CFR 50.53 and 50.54 provided the clinical investigation is either: 
(1) related to their status as wards; or (2) conducted in schools, camps, hospitals, institutions, or similar 
settings in which the majority of children involved as subjects are not wards (21 CFR 50.56).  In other 
words, one of these criteria must be satisfied in order for children who are wards to be enrolled in clinical 
investigations involving greater than minimal risk and no prospect of direct benefit, but likely to yield 
generalizable knowledge about the subjects' disorder or condition (21 CFR 50.53) or clinical 
investigations not otherwise approvable that present an opportunity to understand, prevent, or alleviate a 
serious problem affecting the health or welfare of children (21 CFR 50.54). 
 
If a clinical investigation is approved under 21 CFR 50.56(a), the IRB must require that an advocate be 
appointed for each child who is a ward (21 CFR 50.56(b)).  The IRB must ensure that such an advocate is 
in place, but the IRB itself is not required to appoint the advocate.  The advocate, who may serve as an 
advocate for more than one child, serves in addition to any other individual acting on behalf of the child 
as guardian or in loco parentis78 (21 CFR 50.56(b)(1) and (2)).  The advocate must be an individual who 
has the background and experience to act in, and agrees to act in, the best interest of the child for the 
duration of the child's participation in the clinical investigation (21 CFR 50.56(b)(3)).  The appropriate 
expertise for an advocate should include, but is not limited to, education and/or experience in pediatric 
medicine, law, child advocacy, foster parenting, behavioral sciences, or child psychology.  The advocate 
should be adequately informed about the potential risks and benefits of the proposed clinical 
investigation, and about how the intervention is likely to affect the individual child.  The advocate must 
not be associated in any way (except in the role as advocate or member of the IRB) with the clinical 
investigation, the investigator(s), or the guardian organization (21 CFR 50.56(b)(4)). 
 
Wards of the state can participate in clinical investigations approved under 21 CFR 50.51 (i.e., research 
involving no more than minimal risk) and 21 CFR 50.52 (i.e., research involving greater than minimal 
risk but presenting the prospect of direct benefit), and FDA regulations do not require the appointment of 
an advocate for children who are wards involved in clinical investigations approved under these sections.  
However, IRBs should consider the appointment of an advocate in such clinical investigations in order to 
ensure that there is someone who will act in the best interest of the ward(s) for the duration of their 
participation in the clinical investigation.  Before enrolling any child who is a ward in a clinical 
investigation approved under 21 CFR 50.51 or 21 CFR 50.52, IRBs should ensure that each child has a 
 
78 FDA considers an individual acting in loco parentis to be an individual having the legal authority and 
responsibility to act in place of a parent. 
  45  Contains Nonbinding Recommendations 
 
guardian and/or advocate with the background, experience and commitment to act in the best interest of 
the child. 
 
3.  What are some considerations for enrolling non-English speaking subjects79? 
 
Prospective subjects who do not understand English may ask or be asked to participate in a clinical trial in 
locations where English is the predominant language.  The investigators and the IRBs that review such 
research should carefully consider the ethical ramifications of enrolling or excluding prospective subjects 
when a language barrier may exist between the investigator(s) and some or all of the prospective subjects.  
Consistent with the requirement that selection of subjects be equitable (21 CFR 56.111(a)(3)), individuals 
should not routinely be excluded from participating in research simply because they do not understand 
English. 
 
When prospective subjects who do not understand English are to be enrolled in a clinical study, IRBs and 
investigators must ensure that the information given to such prospective subjects or their LARs is in 
language understandable to the subjects or their LARs (21 CFR 50.20).  FDA considers understandable to 
mean that the information presented to prospective subjects is in a language and at a level they can 
comprehend, including an explanation of scientific and medical terms. 
 
The IRB must review and approve consent documents (long form or short form with written summary) 
that are to be used by investigators to document the informed consent of subjects (21 CFR 50.27(a) and 
21 CFR 56.111(a)(4) and (5)).  When translation and interpretation are needed for written and oral 
information that is to be presented to subjects, FDA recommends that the IRB review, and if appropriate, 
approve reasonable procedures for ensuring that the translations will be prepared by a qualified individual 
or entity, and that interpretation assistance is available. 
 
 
79 FDA strongly encourages stakeholders to ensure that informed consent documents are accessible to individuals 
with limited English proficiency. To the extent an organization receives Federal financial assistance from HHS, Title 
VI of the Civil Rights Act of 1964 and its implementing regulations require the organization to take reasonable steps 
to provide meaningful access by individuals with limited English proficiency. See 42 U.S.C. 2000d, et seq; 45 CFR 
part 80; see also Section 1557 of the Affordable Care Act, 42 U.S.C. 18116, which provides similar protections as 
those under Title VI in health programs and activities receiving Federal financial assistance. This guidance provides 
information to assist institutional review boards (IRBs), clinical investigators, and sponsors in complying with 
FDAs informed consent regulations for clinical investigations. It does not provide guidance on how to comply with 
any regulatory obligations stemming from a source outside of the statutes FDA administers and FDAs regulations.   
  46  Contains Nonbinding Recommendations 
 
A protocol amendment in which the investigator proposes to include use of translated informed consent 
documents for a study already approved by the IRB with English language consent documents may be 
considered no more than a minor change to the research and may qualify for an expedited review 
procedure under FDA regulations at 21 CFR 56.110(b). 
 
FDA notes that informed consent should be viewed as an ongoing process throughout the course of a 
subjects involvement in the research.  Therefore, FDA recommends that whenever subjects who do not 
understand English are involved in research, appropriate interpreter services be made available 
throughout the course of the research. 
 
4.  What process should be followed when it is expected that subjects who do not understand 
English will be enrolled? 
 
When investigators reasonably expect that the subject population for a proposed study will include 
individuals who do not understand English and can anticipate the specific language(s) that these 
individuals will understand, the investigator should submit to the IRB, prior to its initial review, 
appropriately translated consent documents (i.e., either a long form or a short form with written 
summary).  The investigators should also provide the IRB with a description of how interpreters for oral 
communication will be made available to subjects during the research.  For example, if the investigators 
reasonably expect that the subject population for a proposed research protocol will include individuals 
who only understand Spanish and others who only understand Russian, the investigators should submit to 
the IRB, prior to its initial review, consent documents (i.e., either a long form or a short form with written 
summary) translated into Spanish and Russian along with a description of how interpreters for oral 
communication in Spanish and Russian will be made available during the research.  The next Frequently 
Asked Question describes the process that may be followed when the enrollment of a subject who does 
not understand English is unexpected and no prior arrangements for this possibility have been made. 
 
5.  What process should be followed when the enrollment of subjects who do not understand 
English is not expected? 
 
FDA recognizes that investigators on occasion face circumstances where: (1) a prospective subject who 
does not understand English is eligible for an IRB-approved research protocol; and (2) the investigator 
has an IRB-approved English language long form but does not have an appropriate IRB-approved written 
translation of the long form or written summary for the study.  This may occur because neither the 
investigator nor the IRB reasonably expected enrollment of a subject for whom a translation would be 
needed. 
 
  47  Contains Nonbinding Recommendations 
 
For some research, the timeframe for subject enrollment may provide sufficient time for the preparation 
of an appropriately translated long form or an appropriately translated written summary to be used with a 
short form.  When translation or interpretation is needed for written and oral information that is to be 
presented to subjects, FDA recommends that the IRB review, and if appropriate, approve reasonable 
procedures for ensuring that the translations will be prepared by a qualified individual or entity, and that 
interpretation assistance is available. 
For other research, the timeframe for enrollment of a subject who does not understand English may not 
provide sufficient time for preparation of appropriately translated consent documents.  As a contingency 
for this situation, many IRBs have arranged for translation of a generic short form in multiple languages 
that satisfies the requirements of FDA regulations at 21 CFR 50.27(b)(2) and have prospectively 
approved the use of such short forms for enrollment of subjects who do not understand English as needed 
for any research protocol.  In such circumstances, FDA considers procedures that include the following 
sequential steps to be one acceptable way of obtaining and documenting the informed consent of the 
subject: 
 
Step 1  Determine That There is Sufficient Justification to Enroll the Subject Without Using a 
Translated Long Form to Document the Subjects Informed Consent 
 
The investigator, in consultation with the IRB chairperson (or another IRB member designated by the 
chairperson, hereafter referred to as designee) whenever feasible, determines that there is sufficient 
justification (e.g., due to a limited therapeutic window) for obtaining the subjects consent without 
waiting for a translated long form to be reviewed and approved by the IRB prior to enrollment of the 
subject.  In making a decision to allow enrollment of a subject who does not understand English into a 
research protocol without waiting for a written translation of the long form, the investigator (and 
whenever feasible the IRB chairperson or designee) should consider whether the consent process, under 
this circumstance, will provide the subject with sufficient opportunity to understand the information being 
presented.  If consent is sought and the investigator believes that the prospective subject has not 
understood the information presented, then the individual should not be enrolled in the research. 
 
Step 2  Obtain and Document the Subjects Informed Consent in Accordance with FDA 
Regulations at 21 CFR 50.20, 21 CFR 50.25 and 21 CFR 50.27 Using a Translated Short Form and 
the English Language Version of the Long Form as the Written Summary 
 
In accordance with the requirements of 21 CFR 50.27(b)(2), informed consent is documented using a 
short form that has been translated into a language understandable to the prospective subject and 
approved by the IRB.  As a prerequisite to using this procedure, the investigator must have available a 
short form written in a language understandable to the prospective subject or LAR and previously 
approved by the IRB (21 CFR 50.20 and 21 CFR 50.27(a)).  To meet this prerequisite, the IRB must 
  48  Contains Nonbinding Recommendations 
 
require that the sponsor or investigator arrange for translation of a generic short form into a language 
understandable by the prospective subject or LAR, and the IRB must have approved the prospective use 
of such short forms for enrollment of subjects who do not understand English, as needed.  Additionally, 
the IRB must approve a written summary of what is to be said to the subject or the LAR (21 CFR 
50.27(b)(2)).  The IRB-approved English long form often serves as this written summary.  The translator 
should be fluent in both English and in the subjects language.  It may be appropriate to have a translator 
available for all subsequent study visits to relay information between the subject and study personnel. 
 
The procedure for obtaining and documenting the subjects informed consent with a translated short form 
and an English version of the long form includes the following: 
(1) The investigator (or their designee) obtaining informed consent, with the assistance of an 
interpreter if needed (e.g., if the investigator is not bilingual), provides orally to the subject the 
elements of informed consent required by FDA regulations at 21 CFR 50.25 and any additional 
pertinent information included in the IRB-approved English version of the long form.  This 
presentation may be an oral translation of the IRB-approved English version of the long form.  
The oral presentation must be in language understandable to the subject (21 CFR 50.20).  The 
investigator, with the assistance of an interpreter if needed, answers any questions from the 
prospective subject.  There must be a witness to the oral presentation who must not be the person 
obtaining informed consent (21 CFR 50.27(b)(2)).  Furthermore, FDA strongly recommends the 
witness be fluent in the language of the oral presentation.  The witness must, at a minimum, have 
sufficient proficiency in the language of the oral presentation to be able to attest to the 
information that was to the presented orally to the prospective participant (21 CFR 50.27(b)(2).)  
In addition, if possible, the witness should not be related to the subject.  
(2) At the time informed consent is sought, the subject is given the IRB-approved translated short 
form and a copy of the IRB-approved English version of the long form, which serves as the 
written summary. 
(3) The short form is signed and dated by the subject or LAR. 
(4) The witness signs both the short form and the copy of the IRB-approved English version of the 
long form.  (Note that when an interpreter assists the person obtaining consent, the interpreter 
may serve as the witness, but is not required to do so.) 
(5) The person actually obtaining consent signs the copy of the IRB-approved English version of the 
long form. 
 
Step 3  Take Additional Actions Following Subject Enrollment 
 
After the subject has been enrolled in the research, the investigator takes the following additional actions: 
  49  Contains Nonbinding Recommendations 
 
(1) If a subject was enrolled in the research using an untranslated long form to serve as the written 
summary, and if the investigator did not consult with the IRB chairperson (or designee) prior to 
enrollment of the subject who does not understand English, the investigator should promptly 
notify the IRB chairperson (or designee) that such a subject was enrolled. 
(2) The investigator must obtain a translated copy of the IRB-approved English version of the long 
form that served as the written summary, which should be done promptly.  The investigator 
promptly submits it to the IRB for review and approval.  Once the translated long form/written 
summary is approved by the IRB, the investigator must provide it to the subject or LAR and 
should do so as soon as possible.  FDA considers this step essential to the requirement that 
informed consent be documented by the use of a written consent document and that the subject be 
provided a copy (21 CFR 50.27).  Many of the clinical investigations regulated by FDA involve 
ongoing interventions and may involve long-term follow-up.  For this reason, translation of the 
long form is critically important as a means of providing subjects or their LAR an ongoing source 
of information understandable to them. 
Additionally, as noted above in Frequently Asked Question #3, FDA recommends that whenever subjects 
who do not understand English are involved in research, appropriate interpreter services be made 
available throughout the course of the research. 
 
6.  What should be considered when enrolling subjects with low literacy and numeracy? 
 
Although a competent person who does not read and write well can give informed consent and enroll in a 
clinical investigation, the sponsor, clinical investigator, and IRB should consider whether any 
modifications to the informed consent process are necessary to ensure that the informed consent process 
is understandable. 
 
For subjects with apparent low literacy and/or low numeracy, oral presentation of the information 
contained in the consent document is especially important.  When the elements of informed consent are 
presented orally to the subject or the subjects LAR, the IRB may want to consider approving the use of a 
short form and written summary (21 CFR 50.27(b)(2)), which includes a witness to the oral presentation 
of the informed consent elements who also signs the consent document (see section III.E.4.b, Short 
Form).  It should be noted that, even if the information is presented orally, the subject or the subjects 
LAR is required to sign the consent form (whether the long form or short form is used) unless the IRB has 
waived documentation of informed consent under 21 CFR 56.109(c). 
 
Subjects who cannot write can indicate their consent by "making their mark" on the consent document, in 
lieu of signing and dating the consent form when consistent with applicable law.  In these situations, a 
note should be included in subject case histories required to be maintained under 21 CFR 312.62(b) or 21 
  50  Contains Nonbinding Recommendations 
 
CFR 812.140(a)(3) indicating the reason for the lack of a signature and date as required by 21 CFR 
50.27(a).  The date consent was obtained should be recorded in this note. 
 
7.  What should be considered when enrolling subjects with physical or sensory disabilities? 
 
A person with physical or sensory disabilities (for example, physically unable to talk or write or has 
hearing or visual loss) can enroll in a clinical investigation if competent and able to signal consent 
consistent with applicable law.  Enrolling such subjects into a clinical investigation does not require a 
LAR to be involved with the informed consent process or to sign the consent document unless required by 
State or local law.  The records relating to the clinical investigation must include documentation of the 
informed consent process (21 CFR 50.27) unless excepted under 21 CFR 56.109(c).  FDA recommends 
including in subject case histories required under 21 CFR 312.62(b) or 21 CFR 812.140(a)(3) a 
description of the specific means by which the prospective subject communicated agreement to take part 
in the clinical investigation and how questions were answered.  FDA recommends that investigators 
provide reasonable modifications and auxiliary aids and services when necessary to meet the specific 
needs of the study population.80   For example, for subjects with vision disabilities, the investigator could 
use an audio recording of the contents of the consent form or a consent form with enlarged font, 
depending on the degree of impairment. 
 
8.  What should be considered when enrolling adult subjects with impaired consent capacity? 81 
 
Consent capacity is a persons ability to understand information relevant to the decision to enroll in a 
study, that is, to weigh the risks and benefits of participation, to appreciate the available alternatives 
(including nonparticipation), to reach an informed and voluntary decision regarding participation, and to 
communicate that decision.  Consent capacity also depends, in part, on the complexity of the decision that 
 
80 FDA strongly encourages stakeholders to ensure that informed consent documents are accessible to individuals 
with disabilities. To the extent an organization receives Federal financial assistance from HHS, the organization 
must comply with the Rehabilitation Act of 1973. This guidance provides information to assist IRBs, clinical 
investigators, and sponsors in complying with FDAs informed consent regulations for clinical investigations. It does 
not provide guidance on how to comply with any regulatory obligations stemming from a source outside of the 
statutes FDA administers and FDAs regulations.  
81 For further information on consent capacity, see Research Involving Individuals with Questionable Capacity to 
Consent:  Points to Consider, National Institutes of Health (NIH), Office of Extramural Research, available at 
https://grants.nih.gov/grants/policy/questionablecapacity.htm and SACHRPs Recommendations Regarding 
Research Involving Individuals with Impaired Decision-making, available at https://www.hhs.gov/ohrp/sachrp-
committee/recommendations/2009-july-15-letter-attachment/index.html. 
  51  Contains Nonbinding Recommendations 
 
confronts the prospective subject, which may take into account such factors as study design, risks, and 
anticipated benefits. 
 
Impaired consent capacity may involve partial impairment, impairment that fluctuates over time, or 
complete impairment.  For example, consent capacity can be affected by a wide range of disorders and 
conditions, such as dementia, stroke, traumatic brain injury, intellectual and developmental disabilities, 
serious mental illness, intoxication, and delirium. 
Enrollment of subjects with partial impairment may require modifications to the consent form and process 
to enable those subjects to consent on their own behalf.  When a subjects consent capacity is sufficiently 
impaired that the subject is unable to provide legally effective informed consent, the subject may not be 
enrolled unless the subjects LAR consents on the subjects behalf (21 CFR 50.3(l) and 50.20). 
 
IRBs and investigators should carefully consider whether the inclusion in research of individuals who 
lack consent capacity is ethically appropriate and scientifically necessary.  Whenever individuals with 
impaired consent capacity (partial, fluctuating, or complete) are or may be enrolled in clinical studies, 
ethical and procedural challenges arise.  Considerations that may help address these challenges and 
provide additional safeguards include: 
  Assessing consent capacity of prospective subjects, for example, through use of an independent, 
qualified professional and a process that includes:  (1) documentation of elements of capacity 
(such as understanding information, showing evidence of choice, showing rational reasoning, 
understanding the nature of the situation, and showing reasonable understanding of outcome of 
choice); and (2) assessments at the time of consent, at periodic intervals, and when a subjects 
family member expresses concern about the subjects study participation. 
  Establishing a waiting period in the decision-making process to allow additional time for 
decision-making. 
  Using methods to enhance consent capacity, for example through (1) simplification and/or 
repetition of information, (2) involvement of a subject advocate or trusted family member/friend 
to assist when sharing information about the clinical investigation, and (3) refraining from 
discussions during periods of heightened impairment, when possible. 
  Assessing a subjects understanding after information about the clinical investigation has been 
imparted, for example, through use of a questionnaire. 
  Re-assessing consent capacity after initiation of the clinical investigation for subjects with 
progressive disorders whose cognition may decline. 
  Involving an LAR either initially or later in the clinical investigation if consent capacity 
diminishes. 
  52  Contains Nonbinding Recommendations 
 
  Assessing whether prospective subjects who cannot provide legally effective consent on their 
own behalf may nonetheless be able to provide some form of oral agreement at the outset of the 
study and, as appropriate, throughout the course of the research (e.g., for subjects with 
progressive disorders), and how such oral agreement would be documented.  In such a 
circumstance, an LAR would need to provide documented written consent. 
  Emphasizing the voluntary nature of the decision to participate and the right to withdraw at any 
time. 
  Determining whether the IRB or a third party should observe the consent process. 
 
9.  Who can serve as a legally authorized representative (LAR) and what is their role? 
 
FDA regulations define an LAR as an individual or judicial or other body authorized under applicable 
law to consent on behalf of a prospective subject to the subjects participation in the procedure(s) 
involved in the research (21 CFR 50.3(l)).  The key point to consider when determining who may serve 
as an LAR is that the LAR must be authorized under applicable law to consent on behalf of the 
prospective subject to the procedure(s) involved in the clinical investigation. 
 
In the United States, the legal authority for who may serve as an LAR is determined by State and local 
law.  Where applicable law exists to determine who is authorized to serve as an LAR to consent to an 
individuals participation in research, consent must be obtained from an LAR in accordance with this law.  
Institutions, IRBs, and investigators should have the ability to access information regarding applicable 
laws for the clinical investigations they conduct or oversee, when necessary.  If the IRB, investigator, or 
sponsor is uncertain about State and local laws governing who can serve as an LAR, they should consult 
with their institution and/or legal counsel. 
 
Once identified, an LAR may sign the informed consent form for the prospective subject, should that 
individual be incapable of providing their own informed consent.  Additionally, the LAR should be 
consulted to make decisions on behalf of the subject and to assure that any such decisions are in the 
subjects best interest throughout the duration of the subjects participation in the clinical investigation. 
 
The inclusion of individuals who lack the ability to consent for themselves presents unique ethical and 
procedural challenges for IRBs and investigators.  In such situations, consent to research by an LAR is an 
acceptable alternative under FDAs regulations.  While some prospective subjects, such as those with 
profound cognitive impairment, will not be able to contribute to the consent decision, others may be able 
to appoint an LAR, define the limits of their own research participation, or remain actively involved in the 
decision to enroll and remain enrolled in the research.  As such, individuals with impaired consent 
capacity should be included in the process of consent to the extent possible and consistent with their 
  53  Contains Nonbinding Recommendations 
 
desires and abilities.  In a situation in which a prospective subject is capable of providing informed 
consent at the onset of a clinical investigation but is expected to become less capable of providing 
continued consent as the research progresses (e.g., a long-term clinical trial for Alzheimers), 
consideration should be given at the start of the trial to having subjects designate an individual to serve as 
their LAR once the subjects conditions warrant it. 
10.  How can informed consent be obtained through electronic methods? 
 
FDA supports the use of electronic processes to obtain informed consent.82  Electronic media are being 
used to provide information usually contained within a paper informed consent form, to evaluate the 
subjects comprehension of the information presented, and to document the consent of the subject or the 
subjects LAR.  Electronic processes to obtain informed consent may use an interactive interface for the 
informed consent process, which may facilitate the subject's ability to retain and comprehend the 
information.  Furthermore, these electronic processes may also promote timely entry of any electronic 
informed consent into a study database and facilitate collection of the subjects informed consent from 
remote locations.  Additional guidance on the use of electronic informed consent in clinical investigations 
can be found in the FDA guidance entitled, Guidance for Institutional Review Boards, Investigators, and 
Sponsors, Use of Electronic Informed Consent in Clinical Investigations  Questions and Answers.83 
 
11.  Can a subject participate in more than one clinical investigation simultaneously? 
 
Some subjects may wish to participate simultaneously in more than one clinical trial.  Enrollment in more 
than one clinical investigation could increase risks to subjects, particularly because they may be exposed 
to more than one investigational product for which the safety profile may not be well understood, and 
there may be potential drug or device interactions.  Also, subjects may find it difficult to understand the 
risks and potential benefits or meet the demands of multiple protocols.  FDA generally discourages 
enrollment in multiple investigations, although there are some circumstances in which co-enrollment may 
be appropriate (e.g., rare disease studies that are evaluating different aspects of the condition and 
involvement in one study does not affect the other study).  In addition, this recommendation does not 
apply to certain appropriately designed studies, such as a clinical investigation of a novel drug and a 
companion in vitro diagnostic device that is essential for the safe and effective use of the drug. 
 
 
82 Please see footnote 80. 
83 See FDA Guidance for Institutional Review Boards, Investigators, and Sponsors, Use of Electronic Informed 
Consent in Clinical Investigations  Questions and Answers, available at https://www.fda.gov/regulatory-
information/search-fda-guidance-documents/use-electronic-informed-consent-clinical-investigations-questions-
and-answers. 
  54  Contains Nonbinding Recommendations 
 
Sponsors generally include prohibitions related to the use of concomitant medications in the protocol or 
restrict (via exclusion criteria) inclusion of subjects who have participated in another clinical investigation 
within a specified period of time (for example, the washout period before a subject can enroll in a new 
clinical investigation).  Implied in the prohibitions on concomitant medications is the idea that subjects 
should generally not participate in more than one clinical investigation at a time.  Investigators should 
inquire about multiple enrollments and, when appropriate, discourage this practice in the consent 
document and during informed consent discussions.  Further, when appropriate, the risks of participating 
simultaneously in more than one clinical investigation should be discussed with subjects during the 
consent process but do not necessarily need to be included in the informed consent form. 
 
12.  How should data be handled when an enrolled subject decides to withdraw from a trial? 
 
Under FDA regulations, data collected on subjects up to the time of withdrawal from clinical 
investigations of drugs and devices conducted under an IND or IDE must remain in the study database 
(see, e.g., 21 CFR 312.62(b) and 812.140(a)(3)).84  If a subject withdraws from a study, removal of data 
that were already collected would undermine the scientific validity, and therefore the ethical integrity, of 
the research.  Such removal of data could also put enrolled subjects, future subjects, and eventual users of 
marketed products at an unreasonable risk and could compromise FDAs ability to perform its mission to 
protect public health and safety by assuring the safety and effectiveness of regulated medical products. 
 
FDA recommends that subjects be advised in the consent document that the data collected on them up 
until the point of their withdrawal will remain part of the study database and may not be removed.  An 
investigator should ask a subject who is withdrawing whether they wish to withdraw from the 
investigational interventions only and are willing to continue in the clinical investigation for follow-up of 
associated clinical outcome information.  If a subject withdraws from the interventional portion of the 
clinical investigation but agrees to continued follow-up not addressed in the original consent document, 
the investigator must obtain the subjects informed consent for this limited participation using an IRB-
approved consent document (21 CFR 50.20 and 50.27(a)).  If a subject withdraws from the interventional 
portion of a clinical investigation and does not consent to continued follow-up of associated clinical 
outcome information, the investigator must not access the subjects medical record or other confidential 
records that would require additional consent from the subject (21 CFR 50.20).  However, such records 
 
84 FDA regulations (see 21 CFR 312.62 and 812.140(a)(3)) require investigators to prepare and maintain adequate 
case histories recording all observations and other data pertinent to the investigation on each subject.  For further 
discussion, see FDA Guidance for Sponsors, Clinical Investigators, and IRBs: Data Retention When Subjects 
Withdraw from FDA-Regulated Clinical Trials, available at https://www.fda.gov/regulatory-information/search-
fda-guidance-documents/data-retention-when-subjects-withdraw-fda-regulated-clinical-trials; and OHRP 
guidance, Withdrawal of Subjects from Research Guidance, available at https://www.hhs.gov/ohrp/regulations-
and-policy/guidance/guidance-on-withdrawal-of-subject/index.html. 
  55  Contains Nonbinding Recommendations 
 
may be accessed consistent with the original consent process, without additional consent under FDAs 
regulations, to obtain information collected prior to the subjects withdrawal from the study. 
 
An investigator may consult publicly available sources of information to determine a subjects vital status 
(and if deceased, cause of death) after a subject withdraws from a clinical investigation.  This activity 
does not require subject consent because the information is publicly available. 
 
13.  What steps should be taken to inform subjects when a study is suspended or terminated? 85 
 
A clinical trial may be suspended and possibly terminated for a variety of reasons.  When a study is 
suspended, IRBs, sponsors, and investigators should consider whether subjects should be notified, and if 
so, when, especially given that during a study suspension, complete information may not be available.  
Although the IRB has the authority to require that information be provided to subjects when in the IRBs 
judgment the information would meaningfully add to the protection of the rights and welfare of subjects 
(21 CFR 50.109(b)), all parties should consider what information should be shared with subjects in order 
to ensure that their rights and welfare are protected, that they are not put at risk, and that they receive 
appropriate care, if indicated.  The parties involved, including the subjects treating physicians (if 
different from the investigator), as appropriate, may need to help determine whether it is in the best 
interests of currently enrolled subjects to (a) continue receiving the interventions that were being 
administered to subjects under the study at the present site, (b) be transferred to another study site (if the 
study is only suspended at certain sites) so that participation of the subjects in the study may continue, or 
(c) be transitioned to medical management outside of the research context.  Continuation of subjects on 
the test article may be appropriate, for example, when the test article holds out the prospect of direct 
benefit to the study subjects or when withholding the test article poses increased risk to study subjects.  In 
general, information about these considerations should be shared with subjects so that they may 
understand the changes affecting their participation in the study and to allow them to make informed 
decisions about their continued participation. 
 
If a study is terminated, study subjects should be provided with as much information as possible regarding 
the reason for the termination.  Such a discussion not only recognizes their valuable participation in the 
study but also helps explain the scientific value of the information obtained due to their willingness to 
participate in clinical research.  Such a discussion provides an opportunity to address questions subjects 
may have about an investigational product that was administered to them (e.g., immediate safety 
 
85 For further discussion, see Guidance for IRBs, Clinical Investigators, and Sponsors:  IRB Continuing Review after 
Clinical Investigation Approval, available at https://www.fda.gov/regulatory-information/search-fda-guidance-
documents/irb-continuing-review-after-clinical-investigation-approval.  See section III.H.2, Suspension or 
Termination of IRB Approval. 
  56  Contains Nonbinding Recommendations 
 
concerns, ability to participate in another clinical trial, and appropriate waiting period to do so) and what 
long-term follow-up may be available or necessary.  If the reason for the study termination involves a 
safety concern that may impact the future medical care of the study subjects, it would be important to 
discuss appropriate follow-up procedures with the subjects and possibly the subjects primary care 
provider(s). 
 
14.  Should subjects be informed of aggregate study results at the completion of a trial? 
 
FDA recognizes that subjects are frequently interested in the aggregate results of the clinical investigation 
in which they were enrolled.  FDA supports the return of aggregate research results and recommends that 
they be returned to subjects in a clear and comprehensible manner.  Title VIII of the Food and Drug 
Administration Amendments Act of 2007 (FDAAA), including its implementing regulations in 42 CFR 
part 11, requires the responsible party (usually the sponsor or principal investigator) of certain clinical 
trials of drug products (including biological products) and device products (referred to in FDAAA as 
"applicable clinical trials") to register the trials and submit summary results information to the 
government-operated clinical trials data bank, www.ClinicalTrials.gov, within a certain time period.86  
Summary results information submitted to ClinicalTrials.gov is made publicly available in the databank.87  
As discussed in section III.D, Elements of Informed Consent for Applicable Clinical Trials above, FDA 
issued a final rule88 that amends the informed consent regulations (21 CFR 50.25) to require that the 
informed consent documents for applicable clinical trials include the specific statement that is provided in 
the regulation to inform subjects that clinical trial information for such clinical trials will be available at 
www.ClinicalTrials.gov but it will not include information that can identify subjects individually. 
 
For clinical trials that are not applicable clinical trials, the sponsor or principal investigator may 
voluntarily register the clinical trial and submit summary results information to the databank.89  If a 
sponsor or principal investigator plans to submit summary results information from the trial voluntarily, 
nothing would prevent an investigator, sponsor, or IRB from informing prospective subjects of the plan to 
 
86 See section 801(a) of FDAAA, Pub. L. 110-85, adding 42 U.S.C. 282(j); 
https://uscode.house.gov/view.xhtml?req=(title:42%20section:282%20edition:prelim)%20OR%20(granuleid:USC-
prelim-title42-section282)&f=treesort&edition=prelim&num=0&jumpTo=true . See also 81 FR 64982 (September 
21, 2016), available at https://www.govinfo.gov/app/details/FR-2016-09-21/2016-22129. 
87 See 42 U.S.C.  282(j)(3)(B)(ii).  https://www.govinfo.gov/content/pkg/PLAW-110publ85/pdf/PLAW-
110publ85.pdf#page=87 
88 76 FR 256 (January 4, 2011), available at  https://www.govinfo.gov/content/pkg/FR-2011-01-04/pdf/2010-
33193.pdf. 
89 We note that if a sponsor or principal investigator does choose to voluntarily register a clinical trial or submit 
summary results information for it, they may be subject to additional requirements. See 42 CFR 11.60. 
  57  Contains Nonbinding Recommendations 
 
submit such information in an appropriate manner.  Informed consent forms can direct subjects to 
www.ClinicalTrials.gov, where subjects can obtain certain overall aggregated summary study results 
information.  Investigators and sponsors can describe other plans in the consent form for informing 
subjects of the outcomes of the clinical investigation. 
 
FDA regulations do not directly address the issue of IRB review of return of aggregated results to 
subjects; however, when return of aggregated results is planned at the time of initial IRB review of the 
study, or the decision to share results is made after initial IRB approval but while the study is still open 
with the IRB, then the plan for communicating this information to subjects should be reviewed by the 
IRB.  However, if the plan to share aggregated study results is developed after the study is closed with the 
IRB, the IRB does not need to review the sponsors plan to share the aggregate results.90 
 
15.  Is informed consent required to review patient records? 
 
Sponsors and investigators may seek to review patient medical records for a variety of reasons related to a 
clinical investigation.  Whether the record review is considered part of the clinical investigation, as 
defined under FDAs regulations at 21 CFR 50.3(c) and 21 CFR 56.102(c), is determined by the IRB on a 
case-by-case basis.  If the record review is part of the clinical investigation, then informed consent from 
the subject for the record review is required under 21 CFR part 50. 
 
A survey of patient records at a site may be performed to determine whether the site has a sufficient 
number of patients with the condition of interest for the clinical investigation to be feasible.  Such a 
survey is in preparation for a clinical investigation and does not fall within the definition of a clinical 
investigation and, therefore, does not require informed consent under FDAs regulations.  However, 
sponsors and investigators will need to comply with all applicable requirements under HIPAA and other 
applicable laws in these circumstances. 
 
A patients records may be reviewed to determine whether the patient is eligible for a clinical 
investigation.  In order to facilitate this process, limited information about the prospective subject may be 
recorded.  It should be noted, however, that only information to establish the patients eligibility for the 
study and contact information should be recorded.  This preliminary review of the patients record and 
recording of limited information is considered preparation for a clinical investigation, does not fall within 
the definition of a clinical investigation, and, therefore, does not require informed consent.  Even though 
 
90 For additional discussion of the return of aggregate study results and IRB review, see SACHRPs 
recommendations on this topic at https://www.hhs.gov/ohrp/sachrp-committee/recommendations/2015-april-24-
attachment-d/index.html. 
  58  Contains Nonbinding Recommendations 
 
informed consent is not required by FDA regulations in these instances, other steps necessary to safeguard 
the privacy and confidentiality of the patients information in these records may be required (e.g., under 
the HIPAA Privacy and Security Rules and/or institutional policies).  Many institutions have privacy 
boards to help fulfill this function or they may give the IRB this responsibility.  Review by these entities 
may be required by the institution prior to these record review activities. 
 
If a patients record does not include the basic information necessary to determine whether the patient is 
eligible for the clinical investigation, additional information may be needed about the prospective subject.  
Obtaining informed consent may be required prior to obtaining the additional information.  Please see the 
FDA Information Sheet Screening Tests Prior to Study Enrollment,91 for a discussion of when informed 
consent would be required under FDA regulations. 
 
The records of a subject who was previously enrolled in a clinical investigation may be reviewed 
retrospectively to collect information under certain limited circumstances, consistent with the original 
consent process.  If this retrospective review is to gather information that was intended to be collected but 
was missed (that is, the protocol required collection of the information, but it was not reported in the case 
report form and the purpose of the review is merely to fill in gaps in the record), then this review is 
considered to be covered by the previous informed consent obtained for the clinical investigation and 
further consent from the subject is not required.92 
 
In cases where the additional information to be collected goes beyond what was identified in the original 
protocol and disclosed in the original consent document, obtaining informed consent for the collection of 
additional information for use in a clinical investigation would be required (21 CFR 50.20).  FDA 
recommends that the clinical investigator anticipate the need for obtaining further information and obtain 
consent for medical records review and data collection as part of the initial consent process. 
 
In all of the above situations, privacy and patient confidentiality issues should be considered.  The clinical 
investigator, sponsor, and institution should consider whether institutional policies or other statutory or 
regulatory requirements are applicable to the review of patient records (such as under the HIPAA Privacy 
 
91 FDA Information Sheet Screening Tests Prior to Study Enrollment is available at 
https://www.fda.gov/regulatory-information/search-fda-guidance-documents/screening-tests-prior-study-
enrollment. 
92 For further guidance regarding the consequences of a subjects decision to withdraw from a clinical investigation 
see section III.C.4. 
  59  Contains Nonbinding Recommendations 
 
Rule (45 CFR parts 160 and 164, subparts A and E) or the HHS human subject protection regulations at 
45 CFR part 46).93 
 
16.  How should subjects be informed of new information that may affect their willingness to 
continue participation in the research? 
 
During the conduct of a clinical investigation, significant new information (e.g., protocol changes, new 
findings related to safety) may arise that could affect a subjects willingness to continue their participation 
in the clinical trial.  When this occurs, the IRB should determine whether currently enrolled subjects 
should be provided with the new information and given an opportunity to affirm their willingness to 
continue in the research.  In the research community this process is frequently referred to as reconsent.  
FDA regulations do not use or define the term reconsent, nor do FDA regulations specify the process an 
IRB should use to determine the need or method to inform subjects who are already enrolled in the study 
of the new information.  As such, IRBs have flexibility to establish procedures they think are appropriate 
to provide for subjects to have an opportunity to affirm their willingness to continue in the research. 
 
As a consequence of new information, the investigator may need to revise the consent form to include the 
new information for new enrollees and obtain IRB review and approval before it is used (see 21 CFR 
50.27(a) and 56.109).  Because the consent form is being modified to reflect the new information, the IRB 
should determine whether the investigator should provide currently enrolled subjects with the new 
information either with the revised informed consent document or an alternative method such as a consent 
addendum or information sheet describing the new information. 
 
When a revised consent form is used to inform enrolled subjects of new information and to document 
their willingness to continue in the trial, the investigator may use a prepared summary of the change(s) to 
reduce confusion about the change(s) and aid in presenting the new information.  After the discussion of 
the new information and an acknowledgement of understanding by the enrolled subject, the enrolled 
subject should be asked to sign and date the revised consent document if they are willing to continue 
participating in the research.  When an alternative method is used, such as a consent addendum or 
information sheet, the enrolled subject should be asked to sign and date the consent addendum or 
 
93 Please contact the Office for Civil Rights (https://www.hhs.gov/programs/hipaa/index.html) for additional 
information on HIPAA, including the Privacy Rule, or the Office for Human Research Protections 
(https://www.hhs.gov/ohrp/) for additional information on 45 CFR part 46. 
  60  Contains Nonbinding Recommendations 
 
information sheet.94  FDA recommends that a copy of the signed and dated consent addendum or 
information sheet be provided to the subject. 
 
In general, FDA does not believe it is necessary for subjects who have completed their active 
participation in the study to be informed of new information unless the new information relates to risks 
that may manifest after such participation.  In this situation, it may be appropriate to provide previously 
enrolled subjects with counseling regarding any risk that may be warranted.  Similarly, FDA does not 
believe it is necessary to inform subjects who are still actively participating of new information when the 
change will not likely affect their decision to continue in the study (e.g., an increase in the number of 
study subjects).  However, IRBs may recommend that the investigator provide the above-discussed 
summary to all subjects (previously and currently enrolled subjects) for their awareness. 
 
94 For additional discussion on providing new information to previously enrolled subjects, see SACHRPs 
recommendations on the topic at https://www.hhs.gov/ohrp/sachrp-committee/recommendations/april-7-2020-
attachment-a/index.html. 
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