A Randomized, Double-Blind, Vehicle-Controlled, Parallel Group Study of A-101 Topical Solution Applied Twice a Week in Subjects With Common Warts
Phase: PHASE2
Conditions: Common Wart
Sponsor: Aclaris Therapeutics, Inc.

Aclaris Therapeutics, Inc.  
 
Protocol Number: A-101-WART-203 
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CLINICAL STUDY PROTOCOL 
 
Protocol Number: A-101-WART-203 
20 November 2017 
Amendment 2 
Version 3 
 
 
A RANDOMIZED, DOUBLE-BLIND, VEHICLE-CONTROLLED, PARALLEL GROUP 
STUDY OF A-101 TOPICAL SOLUTION APPLIED TWICE A WEEK IN SUBJECTS 
WITH COMMON WARTS 
 
 
Sponsor 
Aclaris Therapeutics, Inc. 
101 Lindenwood Drive 
Suite 400 
Malvern, PA 19355 
Telephone: (484) 324-7933 
Facsimile: (484) 320-2344 
 
Study Contact 
Judy Schnyder 
Aclaris Therapeutics, Inc. 
101 Lindenwood Drive  
Suite 400  
Malvern, PA 19355 
Telephone:  484-329-2144 
Email:  jschnyder@aclaristx.com 
 
Medical Monitor 
Evyan Cord-Cruz, MD 
Symbio  
21 Perry Street  
Port Jefferson, NY 11777 
Main Number Telephone:  631-403-5126 
Office Number:  516-338-0647 
Mobile Number:  516-982-0677 
Serious Adverse Event Facsimile:  484-324-2359 
Email:  ecruz@symbioresearch.com 
 
 
 
This document is a privileged and confidential communication of Aclaris Therapeutics, Inc. Acceptance of this 
document constitutes an agreement by the recipient that no unpublished information contained herein will be used, 
published or disclosed without prior written approval from Aclaris Therapeutics, Inc. 

Protocol: A-101-WART-203 
Aclaris Therapeutics, Inc. 
 
 
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INVESTIGATOR SIGNATURE PAGE 
Protocol Number:  A-101-WART-203 
 
Protocol Title:  A Randomized, Double-Blind, Vehicle-Controlled, Parallel-Group Study of A-101 
Topical Solution Applied Twice a Week in Subjects with Common Warts 
Protocol Version  
Version 3.0: 20 November 2017 
 
I have reviewed the above-titled protocol and agree that it contains all the information necessary to 
conduct the study as required.  I will conduct the trial in accordance with the principles of ICH Good 
Clinical Practice and the Declaration of Helsinki. 
I will maintain as confidential all written and verbal information provided to me by the Sponsor, 
including but not limited to, the protocol, case report forms, investigator’s brochure, material supplied at 
investigator meetings, minutes of teleconferences, etc.  Such material will only be provided as necessary 
to site personnel involved in the conduct of the trial, involved IRBs or local regulatory authorities. 
I will obtain written informed consent from each prospective trial subject or each prospective trial 
subject’s legal representative prior to conducting any protocol-specified procedures.  The Informed 
Consent Document used will have the approval of the IRB appropriate for my institution. 
 
I will maintain adequate source documents and record all observations, treatments and procedures 
pertinent to trial patients in their medical records.  I will accurately complete the case report forms 
supplied by the Sponsor in a timely manner.  I will ensure that my facilities and records will be available 
for inspection by representatives of the Sponsor, the IRB, and/or local regulatory authorities.  I will 
ensure that I and my staff are available to meet with Sponsor representatives during regularly scheduled 
monitoring visits. 
I will notify the Sponsor within 24 hours of any serious adverse events.  Following this notification, a 
written report describing the serious adverse event will be provided to the Sponsor as soon as possible, 
but no later than five days following the initial notification. 
 
 
 
 
 
Investigator Name (print) 
 
 
 
 
 
 
 
 
 
 
 
 
 
Investigator’s Signature 
 
 
 
 
 
Date 

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Table of Contents 
1. 
SYNOPSIS .................................................................................................................................................... 7 
LIST OF ABBREVIATIONS AND DEFINITIONS OF TERMS ............................................................. 11 
2. 
INTRODUCTION ...................................................................................................................................... 13 
2.1. 
Summary ................................................................................................................................................... 13 
2.2. 
Study Rationale ........................................................................................................................................ 15 
3. 
OBJECTIVES ............................................................................................................................................. 16 
3.1. 
Study Objectives ...................................................................................................................................... 16 
3.1.1. 
Primary Objective ................................................................................................................................ 16 
3.1.2. 
Secondary Objective ............................................................................................................................ 16 
4. 
STUDY DESIGN ........................................................................................................................................ 16 
4.1. 
Number of Subjects and Study Centers ............................................................................................. 17 
4.2. 
Duration of Study .................................................................................................................................... 17 
5. 
STUDY ENTRY CRITERIA .................................................................................................................. 17 
5.1. 
Inclusion Criteria .................................................................................................................................... 17 
5.2. 
Exclusion Criteria ................................................................................................................................... 18 
5.3. 
Removal of Patients from Study Therapy ......................................................................................... 19 
5.4. 
Withdrawal Procedures ......................................................................................................................... 19 
5.5. 
Subject Replacement .............................................................................................................................. 19 
5.6. 
Subject Identifier (SI) ............................................................................................................................. 19 
6. 
STUDY PROCEDURES ........................................................................................................................... 20 
7. 
STUDY TREATMENT............................................................................................................................. 24 
7.1. 
Investigational Study Medication ........................................................................................................ 24 
7.2. 
Subject Randomization .......................................................................................................................... 24 
7.3. 
Study medication packaging, storage and dispensing .................................................................... 25 
7.4. 
Drug Accountability ................................................................................................................................ 26 
7.5. 
Weighing of Study Medication Applicators ...................................................................................... 26 
7.6. 
Study Medication Treatment ................................................................................................................ 26 
7.6.1. 
Preparing the Study Medication for Application ......................................................................... 27 
7.6.2. 
Applying Study Medication to Target and Non-Target Warts on the Trunk and 
Extremities ............................................................................................................................................. 30 
7.7. 
Dose modification .................................................................................................................................... 31 
7.8. 
Previous and Concomitant Therapies ................................................................................................ 32 
7.8.1. 
Previous therapies ................................................................................................................................ 32 

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7.8.2. 
Concomitant therapies ........................................................................................................................ 32 
7.8.3. 
Prohibited therapies ............................................................................................................................. 32 
7.9. 
Breaking the Blind .................................................................................................................................. 33 
8. 
ASSESSMENTS OF CLINICAL EFFICACY .................................................................................... 34 
8.1. 
Target and Non-Target Wart Identification ..................................................................................... 34 
8.2. 
Standardized photography .................................................................................................................... 35 
8.3. 
Physician’s Wart Assessment (PWA) ................................................................................................. 36 
8.4. 
Subject Instructions ................................................................................................................................ 36 
8.5. 
Other Study Supplies .............................................................................................................................. 37 
9. 
ASSESSMENT OF SAFETY .................................................................................................................. 37 
9.1. 
Local Skin Reactions (LSR) .................................................................................................................. 38 
9.2. 
Vital signs .................................................................................................................................................. 39 
9.3. 
Clinical laboratory sampling ................................................................................................................ 39 
9.4. 
Urine pregnancy tests ............................................................................................................................. 40 
9.5. 
Other Evaluations ................................................................................................................................... 41 
9.5.1. 
Demographics and medical history .................................................................................................. 41 
9.5.2. 
Standardized photography ................................................................................................................. 41 
10. 
ADVERSE EVENTS ................................................................................................................................ 42 
10.1. 
Definitions ................................................................................................................................................. 42 
10.1.1. 
Adverse events (AE) ............................................................................................................................. 42 
10.1.2. 
Serious adverse event (SAE) .............................................................................................................. 43 
10.1.3. 
Adverse event reporting period ......................................................................................................... 43 
10.1.4. 
Severity .................................................................................................................................................... 44 
10.1.5. 
Relationship to study medication ...................................................................................................... 44 
10.2. 
Reporting Procedures ............................................................................................................................. 44 
10.2.1. 
Procedures for reporting adverse events ........................................................................................ 44 
10.2.2. 
Procedure for reporting a serious adverse event .......................................................................... 45 
10.2.3. 
Withdrawal Due to an Adverse Event ............................................................................................. 45 
11. 
PREGNANCY ............................................................................................................................................. 46 
12. 
STATISTICAL CONSIDERATIONS .................................................................................................. 46 
12.1. 
Sample Size and Power Consideration ............................................................................................... 46 
12.2. 
Statistical Analysis of Efficacy ............................................................................................................. 47 
12.3. 
Statistical Analysis of Safety Data ....................................................................................................... 48 
12.4. 
Interim Analysis ....................................................................................................................................... 48 

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13. 
QUALITY CONTROL AND QUALITY ASSURANCE ................................................................. 48 
13.1. 
Protocol Amendments ............................................................................................................................ 48 
13.2. 
Protocol Deviations, Violations and Exceptions ............................................................................... 48 
13.3. 
Training ..................................................................................................................................................... 49 
13.4. 
Monitoring ................................................................................................................................................ 49 
13.5. 
Data Management ................................................................................................................................... 50 
13.6. 
Quality Assurance ................................................................................................................................... 50 
13.7. 
Record Retention ..................................................................................................................................... 50 
14. 
ETHICS AND GENERAL STUDY CONDUCT CONSIDERATIONS ....................................... 51 
14.1. 
Institutional Review Board (IRB)/Ethics Committee (EC)...................................................... 51 
14.2. 
Ethical Conduct of the Study ............................................................................................................ 52 
14.3. 
Regulatory Documents ........................................................................................................................... 52 
14.4. 
Contractual Requirements .................................................................................................................... 52 
15. 
APPENDICES ............................................................................................................................................. 53 
15.1. 
Subject Instruction Sheet ...................................................................................................................... 53 
16. 
References .................................................................................................................................................... 57 
 

Protocol: A-101-WART-203 
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1. 
SYNOPSIS 
Protocol Number A-101-WART-203 Synopsis 
Protocol Number: 
 
 
Protocol Title:   
A Randomized, Double-Blind, Vehicle-Controlled, Parallel Group Study of 
A-101 Topical Solution Applied Twice a Week in Subjects with Common 
Warts 
Sponsor: 
 
Aclaris: 
 
Phase of Development: 
 
Phase 2 
Study Drug Description: 
 
A-101 Solution (45%) is a hydrogen peroxide solution that will be supplied in a glass ampule with an 
applicator to be applied to common warts (verruca vulgaris) on the trunk or extremities twice a week.     
 
The study drug, A-101 (hydrogen peroxide) 45% Topical Solution (hereafter referred to as A-101) is a 
colorless solution that must be stored at room temperature (15-25º C or 59 -77 º F).  The blinded vehicle 
solution is packaged to match the active study drug and will be stored under the same conditions.   
Study Objectives: 
 
Primary: 
The primary objective of this study is to evaluate the effectiveness of A-101 45% compared to Vehicle 
when applied to 1 Target common wart on the trunk or extremities.  
 
Secondary: 
The secondary objectives of this study include: 
• 
Evaluate the clinical effect of A-101 45% when applied to all treated warts (Target plus Non-
Target Warts) twice a week 
• 
Duration of response in all treated Warts (Target Warts plus Non-Target Warts) 
• 
Safety of A-101 45% 
Study Design:   
This is a phase 2, multicenter, randomized study to evaluate the safety and efficacy of A-101 45% vs 
Vehicle in subjects with common warts on the trunk or extremities.  Subjects may have up to a total of 6 
treated common warts located on their trunk or extremities.  Investigators will be required to identify 1 
Target Wart for treatment with A-101 study medication.  An additional 5 Non-Target Warts may be 
treated and followed throughout the study protocol therapy.   All identified common warts will be treated 
twice a week for 8 weeks. Subjects will be followed for 3 months after the last weekly treatment.       
 
Approximately 120 evaluable subjects will be randomized to one of 2 treatment arms in a 1:1 ratio.  The 
duration of study participation is anticipated to be up to a maximum of 155 days per subject.  All subjects 
will be followed for at least 12 weeks after the last study medication treatment.   
 
Safety will be evaluated based on clinical laboratory studies (hematology and clinical chemistry), vital 
signs, assessment of local skin reactions (LSRs), assessment of adverse events (AEs), and concomitant 
medication review.   
 
Efficacy will be evaluated based on assessment of each Target and Non-Target Wart according to the 

Protocol: A-101-WART-203 
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Physician Wart Assessment (PWA).  Sites will be required to take standardized color photographs of each 
Target and Non-Target Wart to assist with the documentation of the location of each of the wart 
throughout the study.   
 
Number of Patients to be Enrolled: 
 
Approximately 120 evaluable subjects will be randomized to the study.   
Number of Study Sites: 
 
This study will be conducted in the US only at approximately 17 treatment centers.   
Inclusion Criteria: 
Subjects must meet all of the following criteria to be considered for participation in this study.   
1. Subject is able to comprehend and is willing to sign an informed consent/assent for participation 
in this study. 
2. Male or female ≥ 8 years old. 
3. Subject has a clinically diagnosis of common warts. 
4. Subject has 1 Target Wart and up to 5 additional Non-Target Warts located on the trunk or 
extremities.  The identified Target and Non-Target Warts must meet the requirements as defined 
below: 
a. Each wart must have a longest axis that is ≥3 and ≤8 mm and have a thickness of ≤3mm 
b. Each wart must be a discrete lesion 
c. Each wart must be present for at least 4 weeks 
d. Not be covered with hair which, in the investigator’s opinion, would interfere with the 
study medication treatment or the study evaluations 
e. Not be in an intertriginous fold 
f. Be the only common wart present when the circular cutout template is centered over the 
wart 
5. The Target and Non-Target Warts must have a PWA ≥ 2 
6. Subject chemistry and complete blood count results are within normal limits. If any of the 
laboratory values are outside normal range, the treating investigator must assess the value/s as 
NOT clinically significant and document this in the subject’s medical chart in order for the 
subject to be eligible for randomization.   
7. Woman of childbearing potential (WOCBP) must have a negative urine pregnancy test within 14 
days of the first application of study drug and agree to use an active method of birth control for 
the duration of the study.  
8. Subject is non-pregnant and non-lactating. 
9. Subject is in good general health and free of any known disease state or physical condition which, 
in the investigator’s opinion, might impair the evaluation of any Target or Non-Target Warts or 
which exposes the subject to an unacceptable risk by study participation.   
10. Subject is willing and able to follow all study instructions and to attend all study visits.  
 
Exclusion Criteria: 
Subjects are excluded from this study if any 1 or more of the following criteria is met: 
1. Subject has clinically atypical warts on the trunk or extremities. 
2. Subject is immunocompromised (e.g., due to chemotherapy, systemic steroids, genetic 
immunodeficiency, transplant status, etc.) 
3. Subject has periungual, subungual, genital, anal, mosaic, plantar, flat, or filiform wart as a Target 
or Non-Target Wart. 
4. Subject has a history of Human Immunodeficiency Virus (HIV) infection 
5. Subject has had any Human Papilloma Virus (HPV) vaccine within 1 year prior to Visit 1 

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6. Subject has used any of the following intralesional therapies within the specified period prior to 
Visit 2 
• 
Immunotherapy (e.g., Candida antigen, mumps antigen, Trichophyton antigen); 8 weeks 
• 
Anti-metabolite therapy (e.g., bleomycin, 5-fluorouracil); 8 weeks 
7. Subject has used any of the following systemic therapies within the specified period prior to Visit 
2: 
• 
Immunomodulatory/immunosuppressant therapy (e.g., etanercept, alefacept, infliximab); 
16 weeks 
• 
Glucocorticosteroids (inhaled and intra-nasal steroids are permitted); 28 days 
8. Subject has used any of the following topical therapies within the specified period prior to Visit 2 
on, or in a proximity to any Target or Non-Target Warts, that in the investigator’s opinion 
interferes with the study medication treatment or the study assessments: 
• 
LASER, light or other energy based therapy (e.g., intense pulsed light [IPL], 
photodynamic therapy [PDT]; 180 days 
• 
Immunotherapy (e.g., imiquimod, squaric acid dibutyl ester[SADBE], etc.) 12 weeks 
• 
Liquid nitrogen, electrodesiccation, curettage; 60 days 
• 
Hydrogen peroxide; 90 days 
• 
Antimetabolite therapy (e.g., 5-fluorouracil); 8 weeks 
• 
Retinoids; 90 days 
• 
Over-the-counter (OTC) wart therapies; 28 days 
9. Subject currently has or has had any of the following within the specified period prior to Visit 1 
on or in a proximity to any Target or Non-Target Warts that, in the investigator’s opinion, 
interferes with the study medication treatment or the study assessments: 
• 
Cutaneous malignancy; 180 days 
• 
Sunburn; currently 
• 
Pre-malignancy (e.g., actinic keratosis); currently 
10. Subject has a history of sensitivity to any of the ingredients in the study medications. 
11. Subject has any current skin disease (e.g., psoriasis, atopic dermatitis, eczema, sun damage), or 
condition (e.g., sunburn, excessive hair, open wounds) that, in the opinion of the investigator, 
might put the subject at undue risk by study participation or interfere with the study conduct or 
evaluations.  
12. Participation in another therapeutic investigational drug trial in which administration of an 
investigational study medication occurred with 30 days prior to Visit 1.  
Duration of Treatment 
The duration of the study participation is anticipated to be a maximum of 155 days per subject.  The final 
visit (Visit 13) has a maximum allowable visit window of 7 days:  Study visits are: 
• 
Visit 1 (Day -13 to 0) screening 
• 
Visit 2 (Day 1) randomization; study medication treatment 
• 
Visit 3 (Day 8) study medication treatment  
• 
Visit 4 (Day 15) study medication treatment 
• 
Visit 5 (Day 22) study medication treatment 
• 
Visit 6 (Day 29) study medication treatment 
• 
Visit 7 (Day 36) study medication treatment 
• 
Visit 8 (Day 43) study medication treatment 
• 
Visit 9 (Day 50) study medication treatment 
• 
Visit 10 (Day 57) follow up evaluations, no Target or Non-Target Wart retreatment 
• 
Visit 11 (Day 78) follow up evaluations, no Target or Non-Target Wart retreatment 
• 
Visit 12 (Day 106) follow up evaluations, no Target or Non-Target Wart retreatment 

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• 
Visit 13 (Day 134) follow up evaluations, no Target or Non-Target Wart retreatment; end of 
study 
Criteria for Evaluation 
Efficacy: 
The investigator will evaluate the severity of each Target and Non-Target Wart using the Physician Wart 
Assessment (PWA) 
 
Safety: 
Safety will be evaluated by following adverse events, clinical laboratory exams, vital signs, concomitant 
medications, as well as through skin examinations and general physical exams.   
 
 
Study Drug Administration 
 
Study drug medication will be applied to each Target and Non-Target Wart meeting the requirements for 
retreatment twice a week for 8 weeks.   At Visit 2, subjects who are 18 years of age or older will apply the 
A-101 study medication in the presence of the treating physician or a member of the investigational site 
staff who is a trained healthcare professional.   The second weekly application of the A-101 study 
medication will be applied by the subject at home.  Subjects between the ages of 8 and 17 years of age 
will have their A-101 study medication applied in the office by a parent or legal guardian in the presence 
of the treating physician or a member of the investigational site staff.  The second weekly A-101 study 
medication application will be applied at home by a parent or a legal guardian.  Each week the 
subject/parent/legal guardian will return to the clinic with the used A-101 study medication applicator that 
has been placed in a biohazardous material bag.  The investigational site will destroy all used A-101 study 
medication applicators as biohazardous material.    
 
Study medication must be applied to each of the Target and Non-Target Warts for approximately 15 
seconds. The treated warts must remain undisturbed for approximately 15 seconds.  This treatment cycle 
must be repeated up to 3 times to each Target and Non-Target Wart.    
 
 

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LIST OF ABBREVIATIONS AND DEFINITIONS OF TERMS 
Abbreviation 
Term 
AE  
Adverse Event 
ALT 
Alanine aminotransferase 
ANCOVA 
Analysis of Covariance 
ANOVA 
Analysis of Variance 
AST 
Aspartate aminotransferase 
BUN 
Blood Urea Nitrogen 
°C 
Degrees Centigrade 
CDMS 
Clinical Data Management System 
CMH 
Cochran-Mantel-Haenszel 
CRA 
Clinical Research Associate 
CRF 
Case Report Form 
CRO 
Contract Research Organization 
CS 
Clinically Significant 
e.g.  
for example, (Latin; exempla gratia) 
EC 
Ethics Committee 
°F 
Degrees Fahrenheit 
FDA 
Food and Drug Administration 
5FU 
5 Fluorouracil 
GCP 
Good Clinical Practice 
HIPAA 
Health Insurance Portability and Accountability Act of 1996 
HIV 
Human Immunodeficiency Virus 
HPV 
Human Papilloma Virus 
H2O2 
Hydrogen Peroxide 
IB 
Investigator’s Brochure 
ICF 
Informed Consent Form 
ICH 
International Conference on Harmonization  
ID 
Identification 
i.e.  
that is (Latin; id est) 
IPL 
Intense Pulsed Laser 

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Abbreviation 
Term 
IRB 
Institutional Review Board 
ITT 
Intent to Treat 
LDH 
Lactate Dehydrogenase 
LOCF 
Last Observation Carried Forward 
LSR 
Local Skin Reactions 
MedDRA 
Medical Dictionary for Regulatory Activities 
mL 
Milliliter 
Mm 
Millimeter 
NCS 
Not Clinically Significant 
OTC 
Over-The-Counter 
PDL 
Pulsed-dye Laser 
PDT 
Photodynamic Therapy 
PP 
Per Protocol 
PWA 
Physician Wart Assessment 
SADBE 
Squaric Acid Dibutyl Ester 
SAE 
Serious Adverse Event 
SI 
Subject Identifier 
SK 
Seborrheic Keratosis 
SOP 
Standard Operating Procedure 
US 
United States 
USP 
United States Pharmacopeia 
WOCBP 
Women of childbearing potential 

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2. 
INTRODUCTION 
2.1. 
Summary 
Warts are benign proliferations of the skin and mucosa that are caused by infection of 
keratinocytes by subtypes of the human papilloma virus (HPV) family.  Cutaneous HPV 
subtypes are a subset of this large group of the DNA papillomavirus family that is capable of 
infecting humans and causing cutaneous lesions. HPVs are ubiquitous in the environment and 
infection occurs most commonly through direct contact with individuals who harbor the virus 
clinically (evident lesions) or subclinically, indirectly through exposure to contaminated 
surfaces, or even by autoinoculation of virus from individual lesions to adjacent uninfected 
skin. Cutaneous manifestations of HPV infection include common warts (verruca vulgaris), 
palmar and plantar warts, mosaic warts, flat warts, and butcher’s warts. Common warts are 
generally small, rounded, hyperkeratotic, exophytic dome-shaped papules or nodules and are 
typically associated with HPV subtypes 1, 2 or 4 though other subtypes are reported. Lesions 
are most commonly located on the fingers (including periungual and subungual regions), dorsal 
surfaces of the hands, and sites prone to trauma (e.g., knees, elbows), but commonly occur at 
virtually any other anatomical location, potentially spreading by autoinoculation from the 
finger/hand lesions. 
In immunocompetent individuals, many common cutaneous warts (up to 2/3rds in some 
reports) may spontaneously resolve in less than 2 years. However, they often persist for many 
years, may be large and/or cosmetically unsightly (e.g., face, hands), spread to distant 
anatomical regions by autoinoculation, be painful and/or prone to trauma, and, importantly, 
provide a significant reservoir of HPV infection in the community, placing (especially 
immunocompromised) individuals at risk for significant morbidity. 

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There are currently no specific antiviral therapies available to treat cutaneous HPV infection 
and there is no FDA-approved topical treatment for cutaneous common warts. Existing 
therapies, many of which are off-label uses of drugs approved for other indications, and many 
of which have never undergone the drug approval process, are  of unproven safety and/or 
efficacy, and are generally directed towards either the direct physical destruction of the lesions 
with locally destructive or ablative modalities such as cryotherapy, electrosurgery, curettage, 
application of acids (e.g., salicylic acid, trichloroacetic acid); locally cytotoxic therapies, such 
as topical podophyllin, cantharidin, topical or intralesional 5-fluorouracil, or bleomycin; topical 
immunomodulatory or immunotherapy (e.g., topical imiquimod, intralesional candida antigen, 
topical squaric acid dibutyl ester) or lesion removal. Several of these therapies are also 
available as over-the-counter (OTC) wart therapies in lesser exposures than used in the office 
setting (e.g., topical salicylic acid preparations, home freezing kits). Systemic therapy with 
agents such as cimetidine, and even local occlusion with duct tape have also been anecdotally 
reported to be effective in some cases. While these methods may achieve cure in some cases, 
many require multiple visits to a physician’s office, and may require providers with specialized 
training and the use of expensive equipment. Such procedures can be painful, may require 
anesthesia and/or analgesia, and they can be complicated by adverse cosmetic outcomes 
including scarring at the treatment site, as well as the typical post-surgical risks of bleeding and 
infection. No one therapy is consistently effective in all cases and, in fact, there is great 
variability among practitioners in the methods employed using each of these techniques with 
great variability of the results. 
 
Hydrogen peroxide (H2O2) is a compound that is ubiquitous in the environment. It is the simplest 
peroxide and a potent oxidizing agent commonly used in innumerable household goods including 
chlorine-free bleaches, general-purpose cleaning products, and disinfectants. Additionally, H2O2 
has been employed as the oxidizing component in hair dyes, and has been used in oral hygiene 
products and tooth-whitening systems for many years. In industry, it is employed in the treatment 
of wastewater. In high concentrations, it is used in bleaching paper, pulp, and textiles. Clinically, 
in addition to its use as an oral topical agent noted above, H2O2 is widely employed at low 
concentrations (e.g., 3%-6%) as a wound irrigant and topical antiseptic/disinfectant, and has been 
in use medicinally since its introduction into clinical practice by Richardson in 1858.  (Schumb 
WC 1955) (Chan HP 2008) (Richardson, On Peroxide of Hydrogen, or Ozone, or Water as a 
Remedy: Continued from a Research Commenced in the Year 1858 1891) (Richardson, On 
Peroxide of Hydrogen, or Ozone, or Water, as a Remedy: Continued from Research Commenced 
in the Year 1858 1891) (Richardson, On the Introduction of Peroxide of Hydrogen as a Medicine 
1866) (Watt BE 2004 )(Zonios 2007). 
 

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H2O2 is an important oxidizing agent in biological systems. The local deleterious effects of 
reactive oxygen species on the skin are mitigated by the presence of a complex antioxidant 
defense system that includes, enzymes such as catalase, glutathione peroxidase, superoxide 
dismutase, thioredoxin reductase, lipoamine, lipid peroxidase and others, as well as non-
enzymatic components including ascorbic acid, urates and uric acid, tocopherol, glutathione, 
ubiquinones, ubiquinol and other water-soluble groups.  The local application of supra-
physiologic concentrations of H2O2 may overwhelm the antioxidant defense systems in the skin, 
allowing H2O2 to act not only through its direct oxidation of organic tissues, generation of 
reactive oxygen species, and local lipid peroxidation, but also by the generation of local 
concentrations of O2 that are toxic to the abnormal lesional (seborrheic keratosis) cells. 
 
An investigator-initiated, single-site, double-blind, vehicle-controlled, parallel-group proof-of-
concept trial: “A randomized, double-blind, vehicle-controlled, parallel group study of hydrogen 
peroxide solution in adult subjects with common warts of the hand (WART-01), was conducted 
utilizing once weekly applications (maximum of four applications) of A-101 (hydrogen 
peroxide) 40% topical solution or placebo (vehicle) topical solution to investigate the potential 
utility of a 40% hydrogen peroxide topical solution for the treatment of common warts on the 
hands. A total of 15 subjects received 4 study medication applications. One subject achieved 
complete clearance of the Target Wart during the investigation, and data from this pilot study 
demonstrated a statistically significant trend towards clearing warts in the A-101 40% group 
when compared with the vehicle. It was the Investigator’s opinion that “1 or 2 additional 
treatments may clear the warts as most A-101 40% treated warts were “Near Clear” at the end of 
the four-week study”. The administration of A-101 40% over four applications one week apart 
showed no untoward effects and the treatment was well tolerated by all subjects. The data and 
clinical observations suggest that a larger study allowing greater than four drug applications and 
evaluating additional doses of A-101 topical solution are warranted. 
 
2.2. 
Study Rationale  
A phase 2 clinical trial was conducted in which subjects were randomized to receive A-101 40%, 
A-101 45% or Vehicle for the treatment of common warts.  Study A-101-WART-201 
randomized a total of 98 subjects with a clinical diagnosis of common warts.  Subjects received 
up to 8 weekly treatments with A-101 study medication.   
The primary and secondary efficacy endpoints of the mean change from baseline to Visit 10 on 
the Physician Wart Assessment (PWA) and the proportion of PWA responders at Visit 10, which 
was defined as target warts judged to be clear or to be clear or mild, demonstrated superiority of 
A-101 45%, but not 40%, versus vehicle.   
Both concentrations of A-101 evaluated were well tolerated. The only TEAEs considered to be 
treatment-related were application site pain for 2 subjects (all events were considered to be mild 
and resolved on the same day without intervention) and chlamydial infection for 1 subject. There 
were no clinically significant changes during the study in laboratory evaluations or vital signs. 
A-101 solution 45% demonstrated superiority versus the matching A-101 solution vehicle (and 
A-101 40%) in physician evaluations of efficacy in treating target warts on the trunk or 
extremities and was well tolerated with occurrence of local skin reactions that were generally 
transient.  Based on these results a phase 2 study comparing A-101 45% vs Vehicle is warranted. 

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3. 
OBJECTIVES 
3.1. 
Study Objectives 
3.1.1. 
Primary Objective 
The primary objective of this study is to evaluate the effectiveness of A-101 45% compared to 
Vehicle when applied to 1 Target common wart on the trunk or extremities twice a week.     
3.1.2. 
Secondary Objective 
The secondary objectives of this study include: 
• Evaluate the clinical effect of A-101 45% when applied to all treated Warts (Target 
plus Non-Target Warts) twice a week 
• Duration of response in all treated Warts (Target Warts plus Non-Target Warts) 
• Safety of A-101 45% 
4. 
STUDY DESIGN 
This is a phase 2, randomized, multicenter, study designed to evaluate the safety and efficacy of 
A-101 45% compared to Vehicle in subjects with common warts on the trunk or extremities.   
 
During the study, the investigator will identify 1 eligible Target Wart and up to 5 additional Non-
Target Warts on each subject on the trunk or extremities.  All Target and Non-Target Warts will 
be treated twice a week for 8 weeks.    
 
Subjects will be required to complete a total of 13 study visits.  The protocol defined study visits 
are: 
• 
Visit 1 (Day -13 to 0) screening 
• 
Visit 2 (Day 1) randomization; study medication treatment 
• 
Visit 3 (Day 8) study medication treatment  
• 
Visit 4 (Day 15) study medication treatment 
• 
Visit 5 (Day 22) study medication treatment 
• 
Visit 6 (Day 29) study medication treatment 
• 
Visit 7 (Day 36) study medication treatment 
• 
Visit 8 (Day 43) study medication treatment 
• 
Visit 9 (Day 50) study medication treatment 
• 
Visit 10 (Day 57) follow up evaluations, no Target or Non-Target Wart retreatment 
• 
Visit 11 (Day 78) follow up evaluations, no Target or Non-Target Wart retreatment 
• 
Visit 12 (Day 106) follow up evaluations, no Target or Non-Target Wart retreatment 
• 
Visit 13 (Day 134) follow up evaluations, no Target or Non-Target Wart retreatment; end of 
study 
 
The second weekly application will be applied by the subject/parent/legal guardian at home.   
 
Refer to Section 6 for a complete list of protocol required study assessments.   
 

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A completed evaluable subject is a subject that misses no more than 3 treatment visits, completes 
Visit 10 and Visit 13 (end of study visit),  and has not had a protocol violation documented 
during the study. 
4.1. 
Number of Subjects and Study Centers 
Approximately 120 evaluable subjects will be randomized to one of two treatment arms at 
approximately 17 investigational centers in the US. 
 
4.2. 
Duration of Study 
The anticipated time for study enrollment is 3 months. The duration of study participation is 
anticipated to be a maximum of 155 days per subject. Subjects will have a total of 13 study 
visits.  The maximum anticipated duration for the study is approximately 8 months. 
 
5. 
STUDY ENTRY CRITERIA 
5.1. 
Inclusion Criteria 
Subjects must meet all of the following criteria to be considered for participation in this study.   
1. Subject is able to comprehend and is willing to sign an informed consent/assent for 
participation in this study. 
2. Male or female ≥ 8 years old. 
3. Subject has a clinical diagnosis of common warts. 
4. Subject has 1 Target Wart and up to 5 additional Non-Target Warts located on the trunk 
or extremities.  The identified Target and Non-Target Warts must meet the requirements 
as defined below: 
a. Each wart must have a longest axis that is ≥ 3 mm and ≤ 8 mm and have a 
thickness of ≤3mm 
b. Each wart must be a discrete lesion 
c. Each wart must be present for at least 4 weeks 
d. Not be covered with hair which, in the investigator’s opinion, would interfere 
with the study medication treatment or the study evaluations 
e. Not be in an intertriginous fold 
f. Be the only common wart present when the circular cutout template is centered 
over the wart 
5. The Target and Non-Target Warts must have a PWA ≥ 2 
6. Subject chemistry and complete blood count results are within normal limits. If any of the 
laboratory values are outside normal range, the treating investigator must assess the 
value/s as NOT clinically significant and document this in the subject’s medical chart in 
order for the subject to be eligible for randomization.   
7. Woman of childbearing potential (WOCBP) must have a negative urine pregnancy test 
within 14 days of the first application of study drug and agree to use an active method of 
birth control for the duration of the study.  
8. Subject is non-pregnant and non-lactating. 
9. Subject is in good general health and free of any known disease state or physical 
condition which, in the investigator’s opinion, might impair the evaluation of any Target 

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and Non-Target Warts or which exposes the subject to an unacceptable risk by study 
participation.   
10. Subject is willing and able to follow all study instructions and to attend all study visits. 
5.2. 
Exclusion Criteria 
Subjects are excluded from this study if any 1 or more of the following criteria is met: 
1. Subject has clinically atypical warts on the trunk or extremities. 
2. Subject is immunocompromised (e.g., due to chemotherapy, systemic steroids, genetic 
immunodeficiency, transplant status, etc.) 
3. Subject has periungual, subungual, genital, anal, mosaic, plantar, flat, or filiform warts as 
a Target or Non-Target Wart.  
4. Subject has a history of Human Immunodeficiency Virus (HIV) infection 
5. Subject has had any Human Papilloma Virus (HPV) vaccine within 1 year prior to Visit 1 
6. Subject has used any of the following intralesional therapies within the specified period 
prior to Visit 2 
a. Immunotherapy (e.g., Candida antigen, mumps antigen, Trichophyton antigen); 8 
weeks 
b. Anti-metabolite therapy (e.g., bleomycin, 5-fluorouracil); 8 weeks 
7. Subject has used any of the following systemic therapies within the specified period prior 
to Visit 2: 
a. Immunomodulatory/immunosuppressant therapy (e.g., etanercept, 
alefacept,infliximab); 16 weeks 
b. Glucocorticosteroids (inhaled and intra-nasal steroids are permitted); 28 days 
8. Subject has used any of the following topical therapies within the specified period prior 
to Visit 2 on, or in a proximity to any Target or Non-Target Warts, that in the 
investigator’s opinion interferes with the study medication treatment or the study 
assessments: 
a. LASER, light or other energy based therapy (e.g., intense pulsed light [IPL], 
photo-dynamic therapy [PDT]; 180 days 
b. Immunotherapy (e.g., imiquimod, squaric acid dibutyl ester[SADBE], etc.) 12 
weeks 
c. Liquid nitrogen, electrodesiccation, curettage; 60 days 
d. Hydrogen peroxide; 90 days 
e. Anti-metabolite therapy (e.g., 5-fluorouracil); 8 weeks 
f. Retinoids; 90 days 
g. Over-the-counter (OTC) wart therapies; 28 days 
9. Subject currently has or has had any of the following within the specified period prior to 
Visit 1 on or in a proximity to any Target or Non-Target Warts that, in the investigator’s 
opinion, interferes with the study medication treatment or the study assessments: 
a. Cutaneous malignancy; 180 days 
b. Sunburn; currently 
c. Pre-malignancy (e.g., actinic keratosis); currently 
10. Subject has a history of sensitivity to any of the ingredients in the study medications. 
11. Subject has any current skin disease (e.g., psoriasis, atopic dermatitis, eczema, sun 
damage), or condition (e.g., sunburn, excessive hair, open wounds) that, in the opinion of 

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the investigator, might put the subject at undue risk by study participation or interfere 
with the study conduct or evaluations.  
12. Participation in another therapeutic investigational drug trial in which administration of 
an investigational study medication occurred with 30 days prior to Visit 1.  
 
5.3. 
Removal of Patients from Study Therapy 
A subject may be removed from the study therapy for a variety of reasons, including: 
• Unacceptable adverse event 
• Subject unwilling or refusal to continue with the protocol defined study visits and/or 
consent withdrawal for study participation 
• Change in compliance with an inclusion/exclusion criteria 
• Use of a prohibited medication (through Visit 13) 
• Pregnancy 
• General or specific changes in the subject’s condition that render the subject unacceptable 
for further treatment in this study in the judgement of the investigator. 
 
If a subject is to be withdrawn from the study, the Aclaris Therapeutics, Inc. study monitor or 
designee must be informed within 24 hours of the decision to remove the subject from the study.   
 
The study may be discontinued at the discretion of Aclaris Therapeutics, Inc.  Some examples of 
reasons for discontinuation are the occurrence of the following:   
• Increased frequency, severity or duration of known AEs 
• Medical, regulatory or ethical reasons affecting the continued performance of the 
study 
• Difficulties in the recruitment of subjects. 
   
5.4. 
Withdrawal Procedures 
If a subject withdraws from the study prior to Visit 13, the reason for and the date of withdrawal 
from the study must be recorded on the eCRF.  If the reason for withdrawal is an adverse event 
or a clinically significant abnormal laboratory test result, monitoring of the subject will continue 
until the event has resolved or stabilized, until the patient is referred to the care of a local health 
care professional, or until a determination of a cause unrelated to the study drug or study 
procedure is made.   
5.5. 
Subject Replacement 
If a subject is randomized to the study but does not receive a dose of study drug, then the subject 
will be replaced.   
 
Subjects that are determined to be screen failures may be rescreened for the study and if 
determined to be eligible for the study they may be randomized using the same subject identifier.   
5.6. 
Subject Identifier (SI) 
The investigator or designee will assign a unique five-digit subject identifier (SI) to each subject 
at Visit 1.  

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The SI format will be NN-NNN where the first 2 digits are the investigational center site number 
(using leading zeroes, as appropriate). The final 3 digits are the subject number and must be 
assigned in ascending numerical order, without omitting or repeating any number, starting with 
001 at each investigational center. For example, the SI for the second subject that signs an 
informed consent at site number 04 would be 04-002.  
 
The subject will be identified using the SI in all study documentation for the duration of the 
study. 
 
6. 
STUDY PROCEDURES 
The schedule of study activities (including assessments, tests, exams, disease assessments, and 
study drug administration) beginning with screening and continuing through the end of study are 
outlined in Table 1.  A written, signed informed consent form (ICF) must be obtained from each 
subject prior to performing any study related procedure (e.g., vital signs, clinical laboratory 
sampling, urine pregnancy test or photography).   

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Table 1: 
 Study Procedures 
Visit  
V1 
Screening 
V2 
V3 
V4 
V5 
V6 
V7 
V8 
 
V9 
V10 
V11 
V12 
V13 
Treatment Day 
-13 to 0 
1 
8 
15 
22 
29 
36 
43 
50 
57 
78 
106 
134 
 Treatment Window 
N/A 
N/A 
±1 
day 
±1 day 
±1 day 
±1 day 
±1 day 
±1 day  
±1 day 
+4 days 
±7 
days 
±7 
days 
+7 days 
Study Procedures 
 
Informed Consent 
X 
 
 
 
 
 
 
 
 
 
 
 
 
Inclusion 
Criteria/Exclusion Criteria 
X 
X1 
 
 
 
 
 
 
 
 
 
 
 
Subject Identifier 
X2 
 
 
 
 
 
 
 
 
 
 
 
 
Medical 
history/demographics 
X 
 
 
 
 
 
 
 
 
 
 
 
 
Fitzpatrick Skin Type 
Assessment 
X3 
 
 
 
 
 
 
 
 
 
 
 
 
Vital Signs 
X4 
 
 
 
 
 
 
 
X 
 
 
 
X 
Prior 
Medications/Therapies 
X5 
 
 
 
 
 
 
 
 
 
 
 
 
Clinical Chemistry and 
CBC6 
X 
 
 
 
 
 
 
 
X 
 
 
 
X 
Urine Pregnancy Test7 
X 
X 
 
 
 
 
 
 
X 
 
 
 
X 
Target Wart Identification8 
X 
 
 
 
 
 
 
 
 
 
 
 
 
Physician’s Wart 
Assessment9 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Target Wart Dimensions10 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Standardized 
Photography11 
X 
X 
 
X 
 
 
 
 
X 
X 
 
 
X 
Subject Randomization 
 
X12 
 
 
 
 
 
 
 
 
 
 
 
Local Skin Reactions 
 
X13 
X13 
X13 
X13 
X13 
X13 
X13 
X 
X 
X 
X 
X 
Study Medication 
Application14 
 
X 
X 
X 
X 
X 
X 
X 
X 
 
 
 
 
Weighing of Study 
Medication Applicators15 
 
X 
X 
X 
X 
X 
X 
X 
 
 
 
 
 
Study Medication 
Application at Home16 
 
 
A-101 Study Medication will be applied at home on Days 4, 11, 
18, 25, 32, 39, 46, 53.  A window of +1 day is allowed.  
 
 
 
 

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Visit  
V1 
Screening 
V2 
V3 
V4 
V5 
V6 
V7 
V8 
 
V9 
V10 
V11 
V12 
V13 
Treatment Day 
-13 to 0 
1 
8 
15 
22 
29 
36 
43 
50 
57 
78 
106 
134 
 Treatment Window 
N/A 
N/A 
±1 
day 
±1 day 
±1 day 
±1 day 
±1 day 
±1 day  
±1 day 
+4 days 
±7 
days 
±7 
days 
+7 days 
Subject Instructions 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
 
Concomitant therapies17 
 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
 
Adverse Events18 
 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
 
 
1Subject inclusion/exclusion criteria will be re-assessed prior to randomization during Visit 2.  
2Investigational sites will assign a unique five-digit subject identifier to each subject at Visit 1. This subject identifier will be used in all study documentation for 
the duration of the study.   
3Each subject’s skin must be assessed during Visit 1 using the Fitzpatrick Skin Type Assessment. Refer to Section 9.5.1 for the scale.  
4Vital signs [including temperature, pulse, respiratory rate, blood pressure, height and weight (Visit 1 only)] will be measured by a qualified staff member at Visit 
1, Visit 9 and Visit 13.   
5Prior medications/therapies will be collected for a time-period of 13 days prior to Visit 2.  Refer to Section 7.8 for a list of permitted and restricted concomitant 
medications.    
6A complete blood count (including hematocrit, hemoglobin, platelet count, red blood cell count and morphology, white blood cell count and differential 
(absolute and %) including basophils, eosinophils, lymphocytes, monocytes and neutrophils and a clinical chemistry panel including albumin, alkaline 
phosphatase, alanine aminotransferase (ALT), aspartate aminotransferase (AST), blood urea nitrogen (BUN), bicarbonate, calcium, chloride, creatinine, glucose, 
lactate dehydrogenase (LDH), phosphorus, potassium, sodium, total bilirubin, total protein, and uric acid.   
7 Woman of child bearing potential will be required to have a urine pregnancy test at Visit 1, at Visit 2 prior to randomization, Visit 9 and Visit 13. 
8The treating investigator will identify 1 Target Wart and up to 5 additional Non-Target Warts on the trunk or extremities.   
9 The investigator will use the Physician Wart Assessment (PWA) to assess each Target and Non-Target Wart.  The investigator must assess the Target and Non-
Target Warts prior to application of the study medication at Visit 2-Visit 9.  In order to be eligible for randomization at Visit 2, the subject must have a PWA 
grade ≥ 2.   
10 The investigator will measure the dimensions (longest axis and thickness of the Target and Non-Target Warts) at Visit 1 and prior to randomization at Visit 2.  
In order for the subject to be randomized at Visit 2 each Target and Non-Target Wart must have the specific dimensions outlined in Section 8.1.   The 
investigator will be required to measure the longest axis of each Target and Non-Target Wart at Visits 3-13. 
11 At Visits 1, Visit 2 (prior to study medication application), Visit 4 prior to study medication application, Visit 9, Visit 10 and at Visit 13, a qualified 
investigational center staff member will take a photograph of each Target and Non-Target Wart using the Aclaris supplied camera.  All photographs will be sent 
to a central imaging laboratory.   
12 Subjects will be randomized at Visit 2 prior to application of study medication.  Investigational study staff will re-confirm subject eligibility prior to 
randomization.   
13 The investigator and subject will assess each Target and Non-Target Wart for local skin reactions associated with irritation at Visits 2-13.  At Visit 2-Visit 9, 
the investigator and subject will assess the Target and Non-Target Warts for LSRs prior to the application of the study medication.  The subject will assess LSRs 
10 (±4) minutes after the application of A-101 study medication and the investigator will assess the LSRs  20 (± 4) minutes after the application of A-101 study 
medication.  Refer to Section 9.1 for the complete list of Local Skin Reaction signs and symptoms.   

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14 During in-office visits, subjects 18 years of age and older will apply their A-101 study medication in the presence of the treating physician or a member of the 
investigational study staff that has been trained on the protocol.  Subjects ages 8 to 17 will have their A-101 study medication applied by a parent/legal guardian 
in front of the treating physician or a member of the investigational study staff during in-office visits.  If a Target or Non-Target Wart meets the criteria for re-
treatment as defined in Section 7.6 the lesion will be re-treated at Visits 3-9.  Following application of study medication, subjects must NOT wash/submerge the 
Target or Non-Target Warts for at least 6 hours and they must NOT apply any topical products to the Target or Non-Target Warts for at least 6 hours.   
15Sites will be required to weigh all A-101 study medication applicators before and after treatment (in-office treatments only) and document the weight of each 
applicator in the subject’s eCRF.   
16All subjects will receive their second weekly treatment of the A-101 study medication at home.  Subjects ages 8 to 17 will have their A-101 study medication 
applied by a parent or legal guardian.  All subjects will need to document the application of A-101 study medication in a subject diary.  The second weekly 
treatment will depend on the PWA assessment performed during the in-office visit that week.  If a wart meets the criteria for re-treatment during the in-office 
visit then the subject/parent/guardian will perform the second weekly treatment at home.   
17All concomitant therapies including (topical and oral) prescription medications, over the counter medications and natural supplements and non-drug therapies 
including chiropractic, physical therapy, and energy based therapy must be documented in the subject CRF.  Subjects must not apply any topical products (e.g., 
moisturizers, sunscreen, etc.) to their Target or Non-Target Warts within 12 hours prior to any study visit.   
18The reporting period for Serious Adverse Events (SAEs) begins when the subject signs the informed consent and continues through Visit 11.  Refer to Section 
10.1.2 for instructions on the reporting of SAEs.  Non-serious clinical adverse events will be collected following the application of the study medication at Visit 2 
and through Visit 11. Non-serious adverse events that occur between the time of consent and study medication application will be documented as medical 
history.   All safety reporting (AEs and SAEs) will conclude at Visit 11 (approximately 28 days after last study medication application) except for clinical 
adverse events related to local skin reactions.      

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7. 
STUDY TREATMENT 
7.1. 
Investigational Study Medication 
The study medications for the study are A-101 45%, and matching Vehicle.  All study medications 
are solutions that are water-clear, colorless solutions which are indistinguishable in physical 
appearance.   
 
Table 2 
Study Medication Information 
Study Medication 
Name 
A-101 45% 
Vehicle 
Manufacturer 
James Alexander Corporation, Blairstown NJ 
A-101 concentration 
(%) 
45 
0 
Pharmaceutical Form 
Solution 
Storage Conditions 
59ºF to 77ºF (15ºC to 25ºC) excessive heat, open flame and 
combustibles, out of direct sunlight and in a well-ventilated, dry area* 
Route 
Topical 
Frequency 
A-101 Study Medication will be applied twice a week for 8 weeks.   
Application 
Safety glasses and nitrile or vinyl examination gloves must be worn 
during the application process.  Latex gloves are prohibited.   
Duration of 
Administration 
Apply study medication to each Target Wart/Non-Target Wart for 
approximately 15 seconds.  Allow each Target/Non-Target Wart to 
remain undisturbed for approximately 15 seconds.  Repeat the 
application/waiting cycle until the study medication has been applied to 
each Target and Non-Target Wart up to 3 times.   
Activated Applicators 
Activated applicators are stable for 4 hours at room temperature (59ºF to 
77ºF or 15ºC to 25ºC) 
*Excursions from these temperature ranges must be reported to Aclaris.   
 
7.2. 
Subject Randomization  
Prior to the start of the study, Aclaris Therapeutics, Inc./designee will generate a randomization list 
that will be provided to the assigned clinical packaging organization for study medication labeling.   
 
The randomization list will be stored with limited access to designated personnel for study 
medication labeling.      
 
Subjects will be randomized to the study in a 1:1 ratio.  Prior to a subject being randomized to the 
study, the investigational site must contact Aclaris Therapeutics to review the subject and obtain 
approval for randomization.  Sites will be sent an email confirmation from Aclaris documenting the 
approval to randomize the subject.   Subjects will be randomized at Visit 2 following re-
confirmation of subject eligibility.   
 

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7.3. 
Study medication packaging, storage and dispensing 
A-101 45% and matching Vehicle will be provided by Aclaris Therapeutics, Inc. and labeled 
according to the local law and legislation.   
 
The study medication will be packaged in single use applicators.  Each single-use applicator 
consists of a crushable glass ampoule that contains 2.2 milliliters (mL) of study medication that 
provides for at least 1.3 mL of study medication available for treatment.  The ampoule is provided 
inside a sealed polyethylene tube with a flocked, doe foot applicator on one end.   
 
Each subject’s blinded kit will contain 20 treatment applicators.  The outside of each subject kit will 
be labeled with a two part, three panel, double blind label.  One part (one-panel) of the label 
remains attached to the Subject Kit, the other part (two-panel tear-off) is separated and attached to 
the subject’s Label Page CRF when the subject is randomized.  In addition, each individual 
applicator will be labeled as well as the box containing the 20 treatment applicators. All labels will 
properly identify the study, sponsor name and be in compliance with applicable regulatory 
regulations.   
 
Sites will dispense one A-101 study medication applicator to a subject during each in-office visit.  
At the conclusion of the in-office visit, the investigational study staff will dispense one A-101 study 
medication applicator to the subject/parent/legal guardian for use at home on the protocol defined at 
home treatment day.   
 
Subjects will be supplied with biohazard containers to place the used A-101 study medication 
applicator in following at home treatments.  Subjects are to be instructed to return the used A-101 
study medication applicator in the biohazard container following each weekly treatment.  The 
investigational site staff is to document the return of the used A-101 study medication applicators in 
the source notes and dispose of the used study medication as biohazardous material.     
 
A-101 study medication must be stored in a location where there is limited access at 59ºF to 77ºF 
(15ºC to 25ºC) protected from excessive heat, open flame and combustibles, out of direct sunlight 
and in a well-ventilated, dry area.  Proper storage of the A-101 study medication must be reviewed 
with the subject prior to dispensing the blinded subject kit.   
 
Investigational study medication supplies are only to be used for subjects properly consented and 
randomized to this study.   
 

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7.4. 
Drug Accountability  
The investigator or designee will maintain an accurate record of the receipt of the study medications 
as shipped by Aclaris Therapeutics, Inc. (or designee), including the date received and the condition 
of the study medications. One copy of this receipt will be returned to Aclaris Therapeutics, Inc. (or 
designee) when the contents of the study medication shipment have been verified and one copy 
maintained in the study file. In addition, an accurate study medication disposition record will be 
kept, specifying the amount dispensed for each subject and the date of dispensing. This inventory 
record will be available for inspection at any time. At the completion of the study, the original 
inventory record will be available for review by Aclaris Therapeutics, Inc. upon request. 
   
Final drug accountability will be completed by the study monitor at the completion of the study and 
all unused study medication will be returned to Aclaris Therapeutics, Inc. drug depot for disposal 
per Aclaris Therapeutics, Inc. (or designee’s) written instructions. 
7.5. 
Weighing of Study Medication Applicators 
For all in-office treatment subject treatment applications, sites will be required to weigh each A-101 
study medication applicator before all Target and Non-Target Warts are treated.  The used 
applicators will be weighed again after all warts have been treated.  The weight of the applicators 
will be documented in the subject’s eCRF.  Sites will be supplied with a scale to weigh each 
applicator.   
 
The A-101 study medication applicators that are sent home with the subject will not be weighed.   
 
7.6. 
Study Medication Treatment 
The study medications are for external, topical use on the Target and Non-Target Warts on the 
appropriate study subject only.  
 
The investigational center staff member must comply with the study medication storage conditions 
outlined in Section 7.1.   
 
During Visit 2-Visit 9 (if Target and/or Non-Target Wart meets the criteria for retreatment), the 
investigational study staff will select the appropriate study medication applicator for treatment of a 
specific subject. Subjects ages 18 years of age and older will apply the appropriately labeled A-101 
study medication to all Target and Non-Target Warts in the presence of the treating investigator or 
investigational staff that has been trained on the protocol.   The second weekly application of the A-
101 study medication will be applied by the subject at home (Days 4, 11, 18, 25, 32, 39, 46, and 
53).  The second weekly treatment will be determined by the PWA assessment performed during 
the in-office visit. If the wart meets the criteria for retreatment, then the subject will apply the A-
101 study medication at home.   
 

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Subjects between the ages of 8 and 17 years of age will have their A-101 study medication applied 
in the office by a parent or legal guardian in the presence of the treating physician or a member of 
the investigational site staff during Visit 2-Visit 9.  The second weekly A-101 study medication 
application will be applied at home by a parent or a legal guardian (Days 4, 11, 18, 25, 32, 39, 46, 
and 53).  The second weekly treatment will be determined by the PWA assessment performed 
during the in-office visit. If the wart meets the criteria for retreatment, then the subject will apply 
the A-101 study medication at home.   
 
Aclaris will provide all subjects with safety eyeglasses and nitrile gloves that are to be worn by the 
individuals applying the A-101 study medication at home.  Subjects will be required to maintain a 
diary to document the date and time of all at home applications of the A-101 study medication.   
 
All subjects will be supplied with biohazardous bags to return all used A-101 study medication 
applicators.  Each week the subject/parent/legal guardian will return to the clinic with the used A-
101 study medication applicator that has been placed in a biohazardous material bag.    
 
At Visit 3-9, any Target or Non-Target Wart that has a PWA grade of >0 and ONLY Target 
Warts or Non-Target Warts that have a PWA grade of >0, must receive study medication 
treatment UNLESS any of the following criteria apply to the Target or Non-Target Wart: 
• The Target or the Non-Target Wart has a pre-treatment LSR grade of 3 (severe) for any sign 
or symptom AND the grade has increased compared to the previous visit. 
• The Target or the Non-Target Wart is, in the investigator’s opinion, not appropriate for a 
retreatment (the investigator must note the reason on the subject’s Comments CRF page). 
• The Target or the Non-Target Wart, in the Investigator’s opinion, cannot be visualized so 
the Investigator cannot assess the PWA.   
 
7.6.1. 
Preparing the Study Medication for Application 
To perform a study medication treatment for Target and Non-Target Warts a staff member will 
select the appropriate study medication applicator from the identified subject’s kit. The following 
instructions outline the procedure for application of the study medication to the Target and Non-
Target Warts.  During each in-office treatment visit, the Investigational Study Staff will be 
responsible for reviewing the following instructions with the subject/parent/legal guardian and 
ensure that they understand how to properly prepare the applicator and apply the A-101 study 
medication:  
• For the in-office treatment applications, the Investigational Study Staff member will prepare 
the A-101 study medication applicator for all subjects, regardless of age by: 
o Washing their hands prior to, and after completing the study medication treatments  
o Wear safety glasses and nitrile or vinyl examination gloves during the treatment; 
latex gloves are prohibited (All subjects will be supplied with safety glasses 
and nitrile or vinyl examination gloves to be used for at home applications) 
o Visually inspect the applicator for damage: 
▪ If the applicator appears damaged do not use it for the treatment, contact the 
study monitor for disposal instructions and select an unused applicator with 
the next highest number for the treatment 

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If the applicator is intact, proceed with the applicator preparation process as outlined in Figure 1. 
 

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Figure 1:   Diagram Showing the Process for Preparing A-101 Study Medication  
 
 
 
 
Step 1:  Hold the Study Medication    Step 2:  Crush the ampule in the 
applicator so that the applicator          applicator by applying pressure at  
cap is pointing up.                               the center of the barrel of the applicator. 
 
 
Step 3:  Remove the sleeve.         Step 4: Tap the barrel of the applicator 
                                                     to ensure the solution is free of the 
                                                      crushed ampule.     
 
 
Target Warts should be cleaned using an 
alcohol wipe prior to application of A-101 
Solution or matching Vehicle Solution.   
 
 

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Step 5:  Gently remove the cap        Step 6:  Express a single drop of 
by twisting while pulling away        the Study Medication Topical Solution  
from the applicator.                          so that the tip of the applicator becomes wet. 
 
 
All subjects will be supplied with treatment application instruction sheets at the completion of each 
in-office visit.   
 
7.6.2. 
Applying Study Medication to Target and Non-Target Warts on the Trunk and 
Extremities  
All subjects that are between the ages of 8 and 17 will have their A-101 study medication applied 
by a parent/legal guardian to all Target and Non-Target Warts on the Trunk and Extremities.    For 
in-office visits, the subject’s parent or legal guardian will apply the A-101 study medication in front 
of a member of the investigational study staff to ensure there is a clear understanding regarding how 
the study medication should be handled.   
 
Subjects 18 years of age and older will apply their A-101 study medication to his/her identified 
Target and Non-Target Warts in the presence of the treating physician or member of the 
investigational staff during in-office visits.  The second weekly application will be performed at 
home.   
 
The following instructions will be used by all subjects/parents/legal guardians applying A-101 study 
medication to all Target and Non-Target Warts:    
• Do not apply the study medications to eyes, nose, mouth, mucous membranes, or open 
wounds 
• Thoroughly cleanse the Target and Non-Target Warts by firmly rubbing with a swab/wipe 
wetted with 70% isopropyl alcohol 
• Using firm pressure and with the tip of the applicator held over the wart, squeeze in the 
middle of the applicator to apply one drop of study medication onto the Target Wart.  
Using the smaller side of the applicator tip, move the applicator around in a circular 
motion to fully saturate the lesion.  Apply the study medication for approximately 15 
seconds.   
• Minimize exposure to the surrounding normal skin 
• During the treatment process remove excess study medication from the surrounding skin 
using a clean absorbent wipe 

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• Ensure the each identified wart is fully saturated with study medication at the end of the ~15 
second application 
• Allow the treated wart to remain undisturbed for ~15 seconds 
• After ~15 seconds repeat the ~15 second application process 
• Repeat the application/waiting cycle until the study medication has been applied to each 
identified Wart up to 3 times. 
• Absorb any remaining A-101 study medication and dry the Target Wart and the surrounding 
skin without wiping or rubbing. 
Document the number of times each identified wart is treated during a treatment Visit.  
After all identified warts have been treated, the subject must be instructed not to disturb any of the 
treated warts until just prior to the post-application LSR evaluation.    
 
7.7. 
Dose modification 
If a subject refuses to allow a study medication initial treatment or retreatment the investigator must 
report the visit number, visit date, Target Wart number(s) the subject refused to allow treatment for 
and the reason for the refusal in the subject’s CRF.  
 
If the subject’s refusal is associated with an AE, the investigator must also report the event on the 
appropriate CRF.  

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7.8. 
Previous and Concomitant Therapies 
7.8.1. 
Previous therapies 
During Visit 1, the investigator or designee will question the subject to ensure they have not used 
any excluded therapies within the specified period prior to Visit 2 to any of the Target or Non-
Target Warts: 
 
• Intralesional Therapy 
o Immunotherapy (e.g., Candida antigen, mumps antigen, Trichophyton antigen) 8 
weeks 
o Anti-metabolite therapy (e.g., bleomycin, 5-fluorouracil); 8 weeks 
• Systemic Therapy 
o Immunomodulatory/immunosuppressant therapy (e.g., etanercept, alefacept, 
infliximab); 16 weeks 
o Glucocortico-steroids (inhaled and intra-nasal steroids are permitted); 28 days 
• Topical Therapy 
o LASER (e.g., pulsed-dye laser [PDL], light (e.g., intense pulsed light [IPL], 
photodynamic therapy [PDT], other energy based therapy); 6 months 
o Immuno-therapy (e.g., imiquimod, squaric acid dibutyl ester [SADBE], etc.); 12 
weeks 
o Antimetabolite therapy (e.g., 5-fluorouracil); 8 weeks 
o Retinoids; 90 days 
o Liquid nitrogen, electrodesiccation, curettage; 60 days 
o Over-the-counter (OTC) wart therapies; 28 days 
 
7.8.2. 
Concomitant therapies 
Concomitant therapies are any new or existing therapy received from Visit 1 until discharge from 
the study.  
 
Concomitant therapies include drug (e.g., prescription, over-the-counter [OTC]) and non-drug (e.g., 
chiropractic, physical therapy, energy-based treatments) therapies. Subjects will refrain from receipt 
of any therapy in compliance with the inclusion/exclusion criteria. Subjects should refrain from 
changing the use of any concomitant therapies during the study.  
 
All new or modified concomitant therapies used during the study must be recorded in the subject 
CRF. 
 
7.8.3. 
Prohibited therapies 
During the course of this study, subjects are prohibited from using the following treatment therapies 
to treat any of the Target or Non-Target Warts: 
 

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• Intralesional Therapy 
o Immunotherapy (e.g., Candida antigen, mumps antigen, Trichophyton antigen)  
o Anti-metabolite therapy (e.g., bleomycin, 5-fluorouracil);  
• Systemic Therapy 
o Immunomodulatory/immunosuppressant therapy (e.g., etanercept, alefacept, 
infliximab);  
o Glucocortico-steriods (inhaled and intra-nasal steroids are permitted);  
• Topical Therapy 
o LASER (e.g., pulsed-dye laser [PDL], light (e.g., intense pulsed light [IPL], 
photodynamic therapy [PDT], other energy based therapy);  
o Immuno-therapy (e.g., imiquimod, squaric acid dibutyl ester [SADBE], etc.);  
o Anti-metabolite therapy (e.g., 5-fluorouracil);  
o Retinoids;  
o Liquid nitrogen, electrodesiccation, curettage;  
o Over-the-counter (OTC) wart therapies;  
  
The investigator should notify the Medical Monitor immediately if any prohibited therapies are 
required to ensure subject safety. 
 
Starting with Visit 2, subjects must not apply any topical products (e.g., moisturizers, sunscreens, 
etc.) to their Target or Non-Target Warts within 12 hours prior to any study visit (Note: routine 
cleansing products are allowed). 
 
After the completion of any study visit where a study medication treatment was performed subjects 
must NOT wash/submerge the Target or Non-Target Warts for at least 6 hours and must not apply 
any topical products to the Target or Non-Target Warts for at least 6 hours. 
 
7.9. 
Breaking the Blind 
The blind may be broken ONLY in the event of a medical emergency, in which knowledge of the 
study medication identity is critical to the management of the subject’s course of treatment.  Before 
breaking the blind the investigator should determine that the information is necessary.  In many 
cases, particularly when the emergency is clearly not study medication-related, the problem may be 
effectively managed by assuming that the subject is receiving an active study medication without 
the need for unblinding.   
 
If deemed necessary to break the blind for a study subject, attempt to contact the Medical Monitor 
to obtain permission to break the blind of a particular subject.  If it is not possible to contact the 
Medical Monitor beforehand, contact her/him as soon as possible after breaking the blind for a 
subject.  
 
To identify a subject’s study medication, locate the second panel of the tear-off label from the 
Subject Kit attached to the subject’s Label Page CRF and follow the instructions on the label.  
Record the date of un-blinding, the reason for the un-blinding and the initials of investigational 
center staff member who performed the un-blinding on the subject’s Label Page CRF.   

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At the end of the study, the original Label Page CRFs will be returned to Aclaris Therapeutics with 
a photocopy placed in the investigator’s study file.  The original Label Page CRFs will be available, 
upon request, to the site if needed to respond to a regulatory inspection.   
 
8. 
ASSESSMENTS OF CLINICAL EFFICACY 
8.1. 
Target and Non-Target Wart Identification 
At Visit 1, the investigator will identify up one Target Wart and up to 5 additional Non-Target 
Warts on the trunk or extremities for each subject for treatment and evaluation. 
 
For this study, the trunk and extremities are defined as: 
• The front and back of the torso from the clavicle to the hips, including the buttocks and 
excluding the genitals and anus 
• The arms from the shoulder to the fingertips, excluding periungual and subungual areas 
• The legs from the hip to the ankles (including the dorsal side of the foot). 
 
At Visit 1, each Target and Non-Target Wart must: 
• Have a longest axis that is ≥3 mm and ≤8 mm 
• Have a thickness ≤3mm 
• Be a discrete lesion 
• Be, when centered in the circular cutout of the provided template, the only 
common wart present (Refer to Figure 2) 
• Not be periungual, subungual, genital, anal, mosaic, plantar, flat or filiform 
• Not be covered with hair which, in the Investigator’s opinion, would interfere with 
the study medication treatments or the study evaluations  
• Not be in an area that may be occluded (e.g., by clothing or footwear or in a skin fold). 
 
Record the location of the Target and Non-Target Wart on the body charts in the CRFs indicating 
landmarks and distances to assist with confirming the location of the Target and Non-Target 
Warts at subsequent visits. 

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At Visit 1, the Investigator and an investigational staff member will identify each Target and 
Non-Target Wart by placing 2 identification (ID) stickers approximately 180 degrees opposite 
each other with the identified wart in the center of the area outlined by the provided circular 
template (diagram not to scale): 
 
                                                  
                                                                      ID Sticker 
                                                   
 
 
 
                                                                                                           23mm diameter template cutout  
                   Target/Non-Target Wart                                                            
  
 
 
 
 
 
                                                                       
 
 
 
 
 
 
 
        ID Sticker  
Figure 2 
Target/Non-Target Wart Identification 
 
At Visits 2-13, an investigational staff member (other than the evaluating investigator) will 
confirm the location of each Target/Non-Target Wart using an appropriate combination of the 
Visit 1 hard-copy reference prints, Visit 2 photographs and the body charts. The staff member 
will identify the Target/Non-Target Warts by placing 2 appropriately colored ID stickers, with 
the Target/Non-Target Wart number written on one sticker, approximately 180 degrees opposite 
each other with the identified wart in the center of area outlined by the provided circular 
template.  
8.2. 
Standardized photography 
At Visits 1, 2, 4, 9, 10, and 13 a qualified investigational center staff member will take 
standardized color photographs of each Target and Non-Target Wart.  
 
The photographs are to document the appearance and location of the subjects’ Target and Non-
Target Warts. The subject’s identity will not be revealed in the study photographs. 
 
At Visit 2, the photographs must be taken prior to the study medication application. 
 
Care must be taken to ensure the same lighting, background, subject positioning relative to the 
camera and camera settings are used for each photograph.  
 

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Sites will be provided with photography equipment and supplies necessary for obtaining the 
Target Lesion photographs.  Detailed instructions for obtaining and managing the photographs 
will be documented in the study specific Photography Manual and provided to the site at the 
study initiation visit.    
 
8.3. 
Physician’s Wart Assessment (PWA) 
The Physician’s Wart Assessment (PWA) is the Investigator’s assessment of the severity of each 
Target and Non-Target Wart at a particular time point. The Investigator should NOT refer to any 
other assessments to assist with this evaluation. This evaluation IS NOT a comparison with the 
PWA at any other visit. 
At every study visit, the Investigator will assess the Target and Non-Target Warts and report the 
one integer that best describes the Target and Non-Target Wart severity using the following scale. 
At any visit where a study medication treatment is performed, the PWA must be completed 
prior to the treatment. 
 
Physician’s Wart Assessment  
Grade Descriptor 
0 
Clear: No visible wart.  No further treatment is indicated  
 
1 
Near Clear:  a visible wart that is less than 3mm in maximal diameter (or length) 
2 
A visible wart ≥ 3mm and < 6 mm in maximal diameter (or length) 
3 
A visible wart ≥ 6mm in maximal diameter (or length) 
At Visit 1 for the subject to be enrolled and at Visit 2 for the subject to be randomized each 
Target and Non-Target Wart must have a PWA grade ≥ 2. 
At Visits 3-9, Target and Non-Target Warts must have a PWA > 0 to be retreated. If the 
Investigator cannot assess the PWA for a Target or Non-Target Wart (e.g., the Target /Non-
Target Wart cannot be visualized because of an LSR such as edema, scabbing, etc.) she/he must 
report the reason in the subject’s CRFs. The Target/Non-Target Wart must not be retreated at that 
visit, and the subject should be seen at the next scheduled visit. 
8.4. 
Subject Instructions 
An investigational center staff member will dispense a Subject Instruction Sheet to each subject 
at Visit 1 (Refer to Appendix 15.1). 
 
Throughout the study, the subjects should: 
• Continue their routine cleansing regimen except they should avoid vigorous scrubbing of 
the Target/Non-Target Warts (e.g., loofah, back brushes, scrubbing straps, abrasive 
washcloths, sponges and cleansing pads, etc.) 
• Continue their routine cosmetics and skin care products 

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• Avoid exposing the Target/Non-Target Warts to excessive natural or artificial ultraviolet 
radiation (e.g., sunlight, tanning beds) and use sunscreen on the Target/Non-Target 
Warts, if excessive exposure cannot be avoided 
• Avoid activities that might irritate the Target/Non-Target Wart 
• Avoid the use of self-tanning lotions and spray tans near the Target and Non-Target 
Warts. 
• Bring the subject instruction sheet and subject diary with them to each visit. 
• Follow all instructions for the proper application of the A-101 study medication when 
applying product at home.  
 
On study visit days, the subjects should: 
• When appropriate for the Target/Non-Target Wart location wear loose fitting clothing to 
the visit (Note: clothing that comes in contact with the study medication may be 
bleached) 
• Starting with Visit 2, not apply any topical products to the Target/Non-Target Wart 
within 12 hours prior to the visit (Note: routine cleansing products are allowed) 
• After the completion of any study visit where a study medication treatment was 
performed DO NOT: 
o Wash/submerge the Target or Non-Target Warts for at least 6 hours 
o Apply any topical products to the Target or Non-Target Warts for at least 6 
hours. 
8.5. 
Other Study Supplies 
Aclaris Therapeutics, Inc. will provide: 
• An appropriate ruler, or other instrument, for measuring of all Target/Non-Target Warts 
dimensions  
• 70% isopropyl alcohol for cleansing the Target/Non-Target Warts during the study 
medication treatment process 
• Templates for use when identifying Target/Non-Target Warts 
• Rulers for use when measuring Target/Non-Target Warts 
• Supplies and instructions for collecting, labeling, shipping and result reporting for the 
clinical laboratory tests and urine pregnancy tests from a third party 
• Equipment, supplies and training for taking standardized photographs 
• Eyewash kits 
• Safety glasses for subjects for self-administration of A-101 study medication 
• Nitrile gloves for subjects for self-administration of A-101 study medication 
• Biohazardous containers and bags for disposal of all used A-101 study medication 
applicators used at home   
9. 
ASSESSMENT OF SAFETY 
In addition to reporting adverse events throughout the study the investigator, a designated and 
appropriately trained staff member or the subject, will perform the following safety assessments 
according to the schedules noted below. 
 
 

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9.1. 
Local Skin Reactions (LSR) 
The LSR assessment is the Investigator’s assessment of the signs and the subject’s assessment of 
the symptoms associated with irritation at the Target/Non-Target Wart site (i.e., the Target/Non-
Target Wart and the skin immediately surrounding the Target/Non-Target Wart exposed to study 
medication). The Investigator may refer previous photographs to assist with these assessments 
only AFTER the PWA has been performed. 
The Local Skin Reaction signs to be assessed are: 
• Erythema 
• Edema 
• Erosion 
• Ulceration 
• Vesicles/bullae 
• Excoriations 
• Scabbing 
 
The Local Skin Reaction symptoms to be assessed (by the Subject) are: 
• Stinging/burning 
• Pruritus (itch) 
At Visits 2-13, the Investigator will evaluate the LSR signs at the Target/Non-Target Wart 
site(s) as follows: 
• At visits where a study medication treatment or retreatment is performed: 
o Perform an LSR assessment prior to any study medication application 
and 
o For treated Target and Non-Target Warts perform an LSR assessment 20 (±4) 
minutes after the Treatment Completion Time. 
 
At Visits 2-13, the Subject will assess the LSR symptoms at the Target/Non-Target Wart site(s) 
as follows: 
• At visits where a study medication treatment or retreatment is performed: 
o Perform an LSR assessment prior to any study medication application 
▪ and 
o For every treated Target and Non-Target Wart site, 10 (±4) minutes after the 
Treatment Completion Time, report the average of the severity of the LSR for all 
symptoms since completion of the study medication treatment. 
 
• At visits where no study medication treatment is performed: 
o Perform an LSR assessment. 
 

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The Investigator and Subject should report the one integer that best describes the severity of 
each LSR sign or LSR symptom for the Target and Non-Target Wart sites using the scale 
below. 
 
Local Skin Reactions 
Grade 
Descriptor 
0 
None 
1 
Mild 
2 
Moderate 
3 
Severe 
 
9.2. 
Vital signs 
Vital signs will be measured by a qualified staff member at Visit 1, Visit 9 and Visit 13. The 
following items will be measured: 
• Body temperature 
• Pulse rate 
• Respiration rate 
• Blood pressure (systolic and diastolic) after the subject sits quietly for at least 5 minutes 
• Height (at Visit 1 only) 
• Weight (at Visit 1 only) 
 
Any measure that is, in the opinion of the investigator, abnormal AND clinically significant (CS 
must be recorded as history if found prior to the first study medication treatment or as an AE if 
found after the first study medication treatment begins (Section 10.1).  
 
A systolic blood pressure >140mm Hg or a diastolic blood pressure >90mm Hg is considered 
abnormal and therefore must be defined as CS or not clinically significant (NCS) on the CRFs.  
9.3. 
Clinical laboratory sampling 
Non-fasting blood samples for clinical laboratory analysis will be collected by a qualified staff 
member at Visit 1, Visit 9 and Visit 13. Approximately 7.5 mL of blood will be collected for 
each chemistry sample and 3 ml of blood will be collected for each complete blood count (CBC). 
These blood samples will be sent to a central laboratory for analysis.  Refer to the study specific 
laboratory manual for instructions regarding handling of the blood samples and shipping 
instructions.   
 
The following tests, at a minimum, will be conducted: 
 
Chemistry Panel 
Complete Blood Count 
Albumin 
Hematocrit 
Alkaline phosphatase 
Hemoglobin 
Alanine aminotransferase (ALT) 
Platelet count 
Aspartate aminotransferase (AST) 
Red blood cell morphology 

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Blood urea nitrogen (BUN) 
Red blood cell count 
Bicarbonate 
White blood cell count 
Calcium 
White blood cell differential 
Chloride 
    % & absolute 
Creatinine 
    Basophils 
Glucose 
    Eosinophils 
Lactate dehydrogenase (LDH) 
    Lymphocytes 
Phosphorus 
    Monocytes 
Potassium 
    Neutrophils 
Sodium 
 
Total bilirubin 
 
Total protein 
 
Uric acid 
 
 
 
The results of the clinical laboratory tests will be reported on the central laboratory’s standard 
reports. These laboratory results will be sent to the investigator via fax.  The investigator must 
review all laboratory reports in a timely manner and note NCS or CS to define the clinical 
relevance of any result that is outside the normal range for the laboratory. The investigator must 
date and initial every laboratory report.  
 
The investigator must review the Visit 1 laboratory results for all the measured analytes for each 
subject prior to Visit 2. The subject must not be randomized at Visit 2 if any of the Visit 1 results 
are outside normal range for the laboratory AND, in the opinion of the investigator, CS. 
 
The investigator must report all laboratory results that are BOTH outside the normal range for 
the laboratory AND, in the opinion of the investigator, CS as medical history if found prior to the 
first study medication treatment or as an AE if found after the first study medication treatment 
begins.  
 
9.4. 
Urine pregnancy tests 
The investigator or designee will perform a urine pregnancy test for subjects who are WOCBP at 
Visit 1, at Visit 2 prior to randomization, Visit 9 and Visit 13. The central laboratory will supply 
each site with a urine pregnancy kit.    
 
Subjects who are WOCBP must have a negative pregnancy test result at Visit 1 to continue in the 
study and at Visit 2 to be randomized. 
 
If the result of any post-randomization urine pregnancy test is positive, the subject will be 
withdrawn from the study and the subject’s pregnancy documented and followed as outlined in 
Section 11. 
 

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9.5. 
Other Evaluations 
9.5.1. 
Demographics and medical history 
At Visit 1, the investigator or designee will collect demographic information including date of 
birth, sex at birth, race and, if appropriate, ethnicity for each subject.  
 
At Visit 1, the investigator must determine each subject’s Fitzpatrick skin type and document 
appropriately on the subject’s CRF. 
  
Table 3 
Fitzpatrick Skin Type Scoring System 
Skin 
Type 
Classification 
Description 
Type I 
always burns, never tans (pale white; blond or red 
hair; blue eyes; freckles) 
Type II 
usually burns, tans minimally (white; fair; blond or 
red hair; blue, green, or hazel eyes) 
Type III 
sometimes mild burn, tans uniformly (cream white; 
fair with any hair or eye color) 
Type IV 
burns minimally, always tans well (moderate brown) 
Type V 
very rarely burns, tans very easily (dark brown) 
Type VI 
Never burns, never tans (deeply pigmented dark 
brown to darkest brown) 
(Fitzpatrick 1988) 
 
Medical history information will be recorded including all medical conditions and disease states 
that, at Visit 1: 
• Are ongoing 
• Require concomitant therapy 
• Are, in the opinion of the investigator, relevant to the subject’s study participation. 
 
9.5.2. 
Standardized photography 
At Visits 1, 2, 4, 9, 10 and 13, a qualified investigational center staff member, other than the 
investigator, will take standardized color photographs of each Target and Non-Target Wart.  
 
The photographs are to document the location of the Target and Non-Target Warts and to assist 
with relocating the Target/Non-Target Warts.  The Target /Non-Target Wart ID stickers must be 
visible in the photographs. The subject’s identity will not be revealed in the study photographs. 
 
At Visit 2, the photographs must be taken prior to the study medication treatment. 
Care must be taken to ensure the same lighting, background, subject positioning relative to the 
camera and camera settings are used for each photograph.  
 

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Equipment, supplies, training and detailed instructions for obtaining and managing the 
photographs will be provided to the investigational center prior to the initiation of subject 
enrollment.  
 
10. 
ADVERSE EVENTS 
10.1. 
Definitions 
10.1.1. 
Adverse events (AE) 
• An adverse event (AE) is any untoward medical occurrence in a patient that develops 
or worsens in severity during the conduct of a clinical study of a pharmaceutical 
product and does not necessarily have a causal relationship to the study drug.  An 
adverse event can, therefore, be any unfavorable and unintended physical sign, 
symptom, or laboratory parameter that develops or worsens in severity during the 
course of the study, or significant worsening of the disease under study (or any 
concurrent disease), whether or not considered related to the study drug.  
Accordingly, an adverse event could include any of the following: 
• intercurrent illnesses 
• physical injuries 
• events possibly related to concomitant medication 
• significant worsening (change in nature, severity, or frequency) of the disease under 
study or other pre-existing conditions.  (NOTE: A condition, recorded as pre-existing, 
that is intermittently symptomatic [e.g., headache] and which occurs during the study 
should be recorded as an adverse event.) 
• drug interactions 
• events occurring during diagnostic procedures or any washout phase of the study 
• laboratory or diagnostic test abnormalities occurring after the start of the study (i.e., 
after screening and once confirmed by repeat testing) that results in the withdrawal of 
the patient from the study, requires medical treatment or further diagnostic work-up, 
or is considered by the study investigator to be clinically significant.  NOTE: 
Abnormal laboratory test results at the screening visit that preclude a patient from 
entering the study or receiving study treatment are not considered adverse events, but 
will be recorded to monitor data from patients who do not meet screening criteria. 
Worsening of any of the Target or Non-Target Wart assessments should be reported as an 
AE ONLY if the use of the study medication is interrupted or discontinued or if therapy is 
required to manage the event.  
 

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The investigator must, for any Target or Non-Target Wart related AE, question the subject 
in detail to determine if there are any confounding factors (e.g., irritation by clothing or 
activity, sunburn) for any such AE.  
 
The investigator should, when certain, report a diagnosis rather than the signs, symptoms or 
clinically relevant abnormal laboratory values associated with the AE. Otherwise, signs, 
symptoms or abnormal laboratory values may be used to describe the AE. 
 
Any CS abnormality discovered prior to the first study medication treatment should be reported 
as medical history, not as an AE. 
 
10.1.2. 
Serious adverse event (SAE) 
A Serious Adverse Event is any untoward medical occurrence that at any dose: 
• Results in death 
• Is life threatening 
• Requires inpatient hospitalization or prolongation of existing hospitalization 
• Results in persistent or significant disability/incapacity,  
• Is a congenital anomaly/birth defect or 
• Is an important medical event 
 
The term “life threatening” refers to an event in which the subject was at risk of death at the time 
of event; it does not refer to an event that hypothetically might have caused death if it was more 
severe. 
 
Inpatient hospitalization is considered to have occurred if the subject is admitted to the hospital 
on an in-patient basis, even if released the same day. Prolongation of hospitalization is defined as 
an additional night stay in the hospital. Hospitalization for elective treatment of a pre-existing 
condition that did not worsen from baseline is not considered an AE.   
 
Important medical events are those that may not be immediately life threatening, result in death 
or hospitalization, but are clearly of major clinical significance and may jeopardize the subject or 
require intervention to prevent one of the outcomes listed in the SAE definition above. These 
should also usually be considered serious. Examples of such events are intensive treatment in an 
emergency room or at home for allergic bronchospasm, blood dyscrasia or convulsions that do 
not result in hospitalization. 
 
10.1.3. 
Adverse event reporting period 
The investigator must start reporting non-serious AEs starting with the subject’s first study 
medication treatment continuing until Visit 11. Non-serious adverse events that occur between 
the time the subject was consented and the first application of study medication will be reported 
as medical history.   
 

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Reporting for SAEs begins after the subject signs the informed consent and continues until Visit 
11 (regardless of relationship to study medication).  If a subject experiences a SAE after Visit 11 
that is deemed by the investigator to be related to study medication, the investigator must report 
this to the Sponsor using the study specific SAE report form.   
 
10.1.4. 
Severity 
The investigator must define the severity of each AE using the following definitions as a 
guideline. The investigator will consider the range of the possible severity of the event and 
identify the severity that is the most appropriate according to her/his medical judgment. 
 
Mild – Awareness of signs or symptom, but easily tolerated 
Moderate – Discomfort, enough to cause interference with usual activity 
Severe – Incapacitating with inability to perform usual activity. 
 
10.1.5. 
Relationship to study medication 
The investigator will determine if there is a reasonable causal relationship between the study 
medication and an AE or not. The investigator will use her/his best medical judgment and 
consider all relevant factors (e.g., temporal relationship, location of the event, the subject’s 
relevant medical history, concomitant therapies and concurrent conditions) to determine the 
relationship of the AE to the study medication. The investigator will define the relationship of an 
AE to the study medication by selecting one of the following categories: 
 
Related – There is a reasonable possibility that there is a causal relationship between the 
study medication and the AE. 
 
Not Related – There is not a reasonable possibility that there is a causal relationship 
between the study medication and the AE. 
 
The term “reasonable causal relationship” means there are facts or arguments to suggest a causal 
relationship (International Conference on Harmonization (ICH) E2A). 
 
10.2. 
Reporting Procedures 
10.2.1. 
Procedures for reporting adverse events 
At each post enrollment visit, the investigator or designee will question the subject to elicit AEs 
using a non-directive question such as “Has there been any change in your health since the 
previous study visit?”   
 
The Investigator/designee will monitor the subject for at least 20 minutes after the Treatment 
Completion Time at any visit during which a study medication treatment is performed to elicit 
AEs in a similar manner. 

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If appropriate, based on the subject’s response to non-directed questioning regarding AEs, the 
investigator or designee will follow-up with directed questions and appropriate evaluations.  
 
Any AE noted during the reporting period must be reported in the source documents and on the 
appropriate AE CRF.  
 
AEs that are defined as “Not Related” to the study medications will be followed until they are 
resolved or until the subject’s last study visit. AEs that are defined as “Related” to the study 
medications will be followed until they are resolved or, if not resolved after the subject’s last 
study visit, until in the opinion of the investigator, the AE reaches a clinically stable outcome 
with or without sequelae. 
 
10.2.2. 
Procedure for reporting a serious adverse event 
Upon becoming aware of a SAE occurring during the AE reporting period, whether or not related 
to the study medications, the investigator must: 
 
1. 
Take the appropriate medical action to ensure the subject’s safety 
2. 
Immediately inform the Medical Monitor of the SAE: 
Evyan Cord-Cruz, MD 
Symbio 
Main Number:  631-403-5126 
Office Number:  516-338-0647 
Mobile Number:  516-982-0677 
Serious Adverse Event Facsimile:  484-324-2359 
Email:  ecruz@symbioresearch.com 
 
3. 
Within 24-hours of becoming aware of the event, a SAE report form, an AE CRF and any 
other relevant information (e.g., concomitant medication CRF, medical history CRF, 
laboratory test results) must be faxed to the SAE Fax line listed above. 
4. 
Monitor and document the progress of the SAE until it resolves or, if not resolved after the 
subject’s last study visit, until in the opinion of the investigator the AE reaches a clinically 
stable outcome with or without sequelae AND the investigator and Medical Monitor agree 
that the SAE is satisfactorily resolved. 
5. 
Inform the Medical Monitor of SAE updates by telephone followed by an SAE form 
update sent by fax or by e-mail. 
6. 
Comply with the appropriate regulatory requirements and Aclaris Therapeutics, Inc. 
instructions regarding reporting of the SAE to the responsible Institutional Review Board 
(IRB) or Ethics Committee (EC). 
 
10.2.3. 
Withdrawal Due to an Adverse Event 
Any patient who experiences an adverse event may be withdrawn from study drug at any time at 
the discretion of the investigator.  If a patient is withdrawn wholly or in part because of an 

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adverse event, both the adverse events page and termination page of the CRF will be completed 
at that time.  The patient will be monitored until the event has resolved or stabilized, until a 
determination of a cause unrelated to the study drug or study procedure is made, or until the 
patient is referred to the care of a local health care professional.  The investigator must inform 
the medical monitor as soon as possible of all patients who are being considered for withdrawal 
due to adverse events.  Additional reports must be provided when requested. 
11. 
PREGNANCY 
 
WOCBP include any female who has experienced menarche and who has not undergone 
successful surgical sterilization (e.g., hysterectomy, bilateral tubal ligation, or bilateral 
oophorectomy) or is not postmenopausal. Postmenopausal is defined as ≥12 months with no 
menses without an alternative medical cause. Women who are WOCBP and are using an active 
method of birth control, are practicing abstinence or where the partner is sterile (e.g., 
vasectomy), should be considered to be WOCBP. 
  
All WOCBP must use an effective method of birth control during the course of the study, in a 
manner such that risk of failure is minimized. 
 
 If a subject or investigator suspects that the subject may be pregnant prior to study medication 
administration, the study medication must be withheld until the results of a pregnancy test are 
available.  If pregnancy is confirmed, the subject must not receive study medication and must be 
discharged from the study.  
 
If, following study medication administration, it is determined that the subject may have been or 
was pregnant at the time of study medication exposure (including at least 2 days after study 
medication administration) the investigator must immediately notify the Medical Monitor and 
record the event on a pregnancy surveillance form. While not an AE or SAE, the investigator 
must report every pregnancy using a pregnancy surveillance form and follow the reporting 
procedures described for SAE reporting (Section 10.2.2). 
 
Protocol-required procedures for trial discontinuation and follow-up must be performed on the 
subject unless contraindicated by pregnancy (e.g., x-ray studies). Other appropriate pregnancy 
follow-up procedures should be considered if indicated. In addition, the investigator must report 
to the Medical Monitor on the pregnancy surveillance form, follow-up information regarding the 
course of the pregnancy, including perinatal and neonatal outcome. Infants should be followed 
for a minimum of six weeks. 
  
12. 
STATISTICAL CONSIDERATIONS 
12.1. 
Sample Size and Power Consideration 
Based on efficacy results from the previous study and the active study medication specified in 
the current protocol for the same indication, sample size for the current study is anticipated to 
provide greater than 90% power to achieve statistical significance in the primary efficacy 
analysis. 

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12.2. 
Statistical Analysis of Efficacy  
 
Primary and secondary efficacy analyses will be performed on the Per-Protocol population, 
defined as all randomized subjects who missed  no more than 3 treatment visits, completed Visit 
10, and who have not had a major protocol violation over that time period, including the use of a 
clinically relevant quantity of a prohibited medication as determined by the study Medical 
Monitor.  No missing data imputation will be used for these analyses.   
 
Visit 10 is considered to be the primary efficacy endpoint.  In addition, some analyses will also 
be conducted at earlier and subsequent visits, and treated as exploratory analyses.  Some 
sensitivity efficacy analyses may also be re-performed on the Intent to Treat population, defined 
as those randomized subjects who have at least one post-baseline visit with required efficacy data 
collection and who completed Visit 10 with required collection of efficacy data.  For those 
analyses, missing efficacy data for intermediate visits will be imputed using the last observation 
carried forward (LOCF) procedure.  A determination as to the performance of analyses using the 
Intent to Treat population will be based on the number and pattern of visits missed by 
randomized subjects.  Exploratory analyses using models specified below may also be performed 
for separate age groups, depending on enrollment outcomes. 
 
For all analyses, two-tail alpha will be set to 0.05 with no adjustment for multiple comparisons.  
ANOVAs and ANCOVAs will include Site in the model only if doing so improves the 
sensitivity of the model for comparing treatment groups. 
 
After the last randomized subject has completed Visit 10 the database will be validated, locked 
through Visit 10 and unblinded for the purpose of analyzing efficacy data through Visit 10.  
Those analyses are not considered to be interim analyses as the results will be final.  Data will 
continue to be collected through Visit 13 for all subjects, and the full database will subsequently 
be locked for efficacy analysis (including durability of response) beyond Visit 10, and for the 
analysis of safety and all other clinical data. 
 
The primary efficacy analysis will be a comparison between treatment groups based on the mean 
change in Target Wart PWA from Baseline (Visit 2) to Visit 10, using Analysis of Covariance 
with Baseline PWA as the covariate.   
 
Secondary efficacy analyses will include comparisons between treatment groups based on the 
following:  the proportion of subjects with the Target Wart Clear (PWA = 0) at Visit 10 using 
Fisher’s Exact Test; the proportion of subjects with all treated warts Clear at Visit 10 using a 
Cochran-Mantel-Haenszel test stratified by number of treated warts; and the mean of per-subject 
percentages of treated warts that are clear at Visit 10 using Analysis of Variance. The number of 
treated warts Clear at Visit 10 will also be analyzed using a Cochran-Mantel-Haenszel test 
stratified by number of treated warts.   
 
Durability of response in the Active treatment group will be evaluated by calculating the 
proportion of those treated warts achieving a PWA status of Clear at Visit 10 which continue to 

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maintain a PWA status of Clear at Visit 13.  This analysis will be performed separately for 
Target Warts, and for all treated warts.  The 95% confidence limits around the calculated 
proportions will also be calculated in order to estimate the population lower limit value of the 
observed sample proportions. 
 
Exploratory analyses will be conducted using a subset of the above analysis models, based on the 
following baseline wart classifications:   warts that are determined to be treatment-naive vs. 
recalcitrant. 
 
12.3. 
Statistical Analysis of Safety Data 
Descriptive statistics will be calculated on the safety parameters using the ITT population. The 
proportion of subjects with treatment-emergent adverse events will be tabulated and presented by 
treatment and Medical Dictionary for Regulatory Activities (MedDRA) System Organ Class. 
Vital signs, LSR scores and clinically relevant abnormal laboratory results will also be tabulated 
and presented by study medication. No inferential testing will be performed. 
 
Data from all randomized subjects will be presented and summarized. Safety summaries by study 
medication group will include listings by study medication of adverse events incidences within 
each MedDRA System Organ Class, and changes from pre-application values in vital signs. 
Adverse event summaries will be presented by study medication showing the proportion of 
subjects experiencing adverse events, both overall and by MedDRA System Organ Class. 
12.4. 
Interim Analysis 
An interim Analysis will not be conducted for this study.     
 
13. 
QUALITY CONTROL AND QUALITY ASSURANCE 
13.1. 
Protocol Amendments 
No changes from the final approved (signed) protocol will be initiated without the prior written 
approval or favorable opinion of a written amendment by the IEC/IRB, except when necessary to 
eliminate immediate safety concerns to the study subjects or when the change involves only 
logistics or administration.  The principal investigator and the sponsor will sign the protocol 
amendment. 
 
13.2. 
Protocol Deviations, Violations and Exceptions 
A protocol deviation is non-adherence to protocol-specific study procedures or schedules that 
does not involve inclusion/exclusion criteria, primary objective variable criteria, and/or GCP 
guidelines.  Deviations are considered minor and do not impact the study.  Deviations include 
study procedures that occurred outside the treatment windows (except for treatment application 
days).  
 
A protocol violation is defined as any divergence from the protocol-specific inclusion/exclusion 
criteria, subject is administered a prohibited medication, primary objective variable criteria, 

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and/or GCP guidelines.  Protocol violations will be identified and recorded, by study center 
personnel, on the CRF. 
 
As a matter of policy, sponsor/CRO will not grant exceptions to protocol-specific entry criteria 
to allow patients to enter a study.  If under extraordinary circumstances such action is considered 
ethically, medically, and scientifically justified for a particular patient, prior approval from 
sponsor/CRO and the responsible IRB/IEC, in accordance with the Sponsor/CROs Standard 
Operating Procedure (SOP), is required before the patient will be allowed to enter the study.  If 
investigative center personnel learn that a patient who did not meet protocol eligibility criteria 
was entered in a study (a protocol violation), they must immediately inform sponsor/CRO.  Such 
subjects will be discontinued from the study, except in a rare instance following review and 
written approval by sponsor/CRO and the responsible IRB/IEC, according to the applicable SOP. 
13.3. 
Training 
For each investigational center, there will be an initiation visit prior to enrolling any study 
subjects. 
 
It is strongly recommended that all investigators, other evaluators, study nurses, study 
coordinators or other applicable personnel attend this visit.  During this visit, participants will be 
trained to the protocol, study specific procedures, and the CRFs.  Those unable to attend the 
initiation visit must receive on-site training from an appropriately trained individual prior to 
participating in any of the procedures and evaluations in this study.  
 
Clinical Research Associates (CRAs) and other applicable personnel will be trained prior to 
study initiation to familiarize CRAs with the disease, the Standard Operating Procedures (SOPs), 
the protocol and other study specific items.  Team organization, communication and operational 
issues will also be discussed. 
 
Aclaris Therapeutics, Inc. will provide an investigational center file to each center. 
 
13.4. 
Monitoring 
The conduct of the study will be closely monitored by the Aclaris Therapeutics, Inc. study 
monitor /CRO to verify adherence to ICH Good Clinical Practice (GCP) guidelines, applicable 
SOPs, the protocol, other written instructions and regulatory guidelines.   
The investigator will allow the Aclaris Therapeutics, Inc. representatives designee and/or and 
any regulatory agency to have direct access to all study records, CRFs, corresponding subject 
medical records, study medication dispensing records and study medication storage area, and any 
other documents considered source documentation.  The investigator also agrees to assist the 
representative, if required.  

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13.5. 
Data Management 
Data will be collected using CRFs that are specifically designed for this study.  The data 
collected on the CRFs will be captured in a clinical data management system (CDMS) that meets 
the technical requirements described in US 21 Code of Federal Regulations (CFR) Part 11.  The 
CDMS will be fully validated to ensure that it meets the scientific, regulatory, and logistical 
requirements of the study before it is used to capture data from this study.  Before using the 
CDMS, all users will receive training on the system and study specific training.  After they are 
trained, users will be provided with individual system access rights. 
The handling of data, including data quality assurance, will comply with regulatory guidelines, 
including ICH and GCP, and the sponsor/CRO SOPs and working instructions.  Data 
management and control processes specific to this study will be described in a data management 
plan.    At the end of the study, the database will be locked and the data will be released for 
reporting and statistical analysis 
13.6. 
Quality Assurance 
The study is conducted under the sponsorship of Aclaris Therapeutics, Inc. in compliance with 
the applicable regulatory requirements as well as applicable ICH guidelines, Helsinki 
Declaration, and in respect of the Aclaris Therapeutics, Inc. and/or sub-contractor SOPs for study 
conduct and monitoring. 
Audits may be carried out by the Aclaris Therapeutics, Inc. or Aclaris Therapeutics, Inc.’s 
representatives and inspections may be performed by regulatory authorities or IRB/ECs before, 
during or after the study.  The investigator will provide the auditing/inspecting group direct 
access to all study records (e.g., CRFs, subject medical records, study medication dispensing 
records) and the investigational center study facilities. The investigator and study staff will be 
available and will assist the auditing/inspecting groups as appropriate.  
13.7. 
Record Retention 
All pertinent data, samples, photographs, correspondence, original or amended protocol, reports 
and all other material relating to the study will be maintained securely in Aclaris Therapeutics, 
Inc./CRO/investigator archives for the legally required duration for archiving. 
The investigator should maintain the essential study documents as specified in ICH GCP, and in 
compliance with all regulatory requirements. The investigator should ensure these documents are 
protected from accidental destruction or disposal. 
If the Investigator needs to re-assign responsibility for maintaining these documents (e.g., due to 
retirement) it must be transferred to a person willing to accept this responsibility.  The 
investigator must notify Aclaris Therapeutics, Inc., in writing, of the name and address of the 
new individual. 
If the Investigator cannot guarantee this archiving requirement at the investigative site for any or 
all of the documents, special arrangements must be made between the Investigator and the 
Sponsor to store these in sealed containers in an off-site storage location so that they can be 
returned to the Investigator in case of a regulatory audit.  Where source documents are required 
for the continued care of the patient, appropriate copies will be made for off-site storage. 

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No trial document should be destroyed without prior written agreement between the Sponsor and 
the Investigator. Should the Investigator wish to assign the trial records to another party or move 
them to another location, the Investigator must notify the Sponsor in writing of the new 
responsible person and/or the new location. 
14. 
ETHICS AND GENERAL STUDY CONDUCT CONSIDERATIONS 
14.1. 
Institutional Review Board (IRB)/Ethics Committee (EC) 
This protocol and any accompanying material, including information that will be provided to 
prospective patients (such as advertisements, patient information sheets, or study descriptions 
used to induce study participation or obtain informed consent) must be submitted to the Central 
IRB for approval.  Approval of each such submission must be obtained from the committee 
before it may be used in the study and must be documented in a written notification to the 
Investigator specifying the protocol number, protocol version, documents reviewed, and date on 
which the committee met and granted the approval.  In particular, each informed consent 
document must bear clear evidence (written, stamp, date of approval, etc.) of IRB approval 
before it may be presented to prospective (or ongoing, as appropriate) study patients for 
signature. 
Written evidence of the approval must be made available to the Sponsor.  Any modifications 
made to the protocol and of correspondingly modified informed consent documents made after 
receipt of Central IRB approval must also be submitted to the committee for approval before 
implementation unless the modification is made on an emergency basis to protect the welfare of 
study patients.  In the latter case, the Central IRB must be notified promptly and their written 
approval must be obtained as soon after the fact as possible. 
Appropriate reports on the progress of the study will be made to the Central IRB and the Sponsor 
by the Investigator in accordance with applicable regulatory regulations and in conformity with 
policies established by both the Central IRB and the Sponsor.  The shortest time interval between 
required reports required by either party or by regulations will prevail. 
The Investigator at each investigative site, or his/her nominee, will be responsible for reporting 
any SAEs to the Central IRB as soon as possible, and in accordance with the guidelines of the 
Central IRB. 
The Sponsor will be responsible for reporting all serious, life threatening or fatal adverse study 
drug events with a causal relationship to the study drug to appropriate regulatory agencies within 
their required timelines. 
 The Investigator is responsible for obtaining written, informed consent(s) from each prospective 
patient interested in participating in this study before performing any study-related procedures.  
Written informed consent must be obtained after adequate, thorough, and clear explanation of the 
aims, methods, objectives, and potential hazards of the study, as well as any use of the patient’s 
genetic information from the study.  The Investigator must use the most current Central IRB-
approved consent form for documenting written informed consent.  Each informed consent will 
be appropriately signed and dated by the patient and the person obtaining consent and each page 
not signed must be initialed and dated by the patient.  The investigational site must retain the 
original signed consent and provide a copy to the patient.   

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14.2. 
Ethical Conduct of the Study 
The Sponsor will use information developed in this clinical study in connection with the 
development of A-101 Solution and, therefore, may disclose it as required to other clinical 
Investigators participating in other studies and to regulatory agencies.  In order to allow the use 
of the information derived from this clinical study, the Investigator understands that he/she has 
an obligation to provide all data produced during this study to the Sponsor. 
The Sponsor considers that clinical data (complete or incomplete) constitute financially sensitive 
information.  Consequently, the Sponsor requires that discussion of results in any form, 
electronic, verbal, or written before study completion and full reporting should only be 
undertaken with the Sponsor’s prior written consent. 
Individual patients’ medical information obtained as a result of this study is considered 
confidential.  The Investigator and the study center will adhere to all applicable laws relating to 
the protection of patient information.  To assure that patients’ confidentiality is maintained, 
patients’ data will be identified by a study-assigned number.  
All Sponsor personnel will handle patients’ data in a confidential manner in accordance with 
applicable regulations governing clinical research.  Subjects’ records will be inspected only in 
connection with this research project.  Information generated as a result of a subject’s 
participation in this study may be disclosed to third parties for research and regulatory purposes 
in any country as determined by the Sponsor.  However, subjects will not be individually 
identified but will be referred to only by the study assigned number. 
14.3. 
Regulatory Documents 
The investigator must maintain a study file containing current and complete regulatory 
documentation in compliance with the current ICH E6 GCP guideline. This file will be reviewed 
as part of the routine monitoring for this study. 
 
14.4. 
Contractual Requirements 
A contractual agreement will be signed between Aclaris Therapeutics, Inc. and each investigator.  
This document will contain supplemental information, including financial terms, confidentiality, 
study schedule, third party responsibility, and publication rights. 
 
 
 
 

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15. 
APPENDICES 
15.1. 
Subject Instruction Sheet 
 
A-101-WART-203 SUBJECT INSTRUCTION SHEET 
Please follow these instructions carefully. Contact the study staff at the telephone number noted 
below if you have any questions about the study: 
Contact: 
 
 
 
 
 
   Telephone:                                      
 
THROUGHOUT THE STUDY: 
• 
Continue your routine cleansing regimen except avoid vigorous scrubbing of the Target 
and Non-Target Warts (e.g., abrasive cleansing pads, abrasive cleansers, etc.) 
• 
Continue your routine skin care products 
• 
Avoid exposing the Target and Non-Target Warts to excessive natural or artificial 
ultraviolet radiation (e.g., sunlight, tanning beds) and use sunscreen on the warts, if 
excessive exposure cannot be avoided 
• 
Avoid activities that might irritate the Target or Non-Target Warts 
• 
Bring this subject instruction sheet and subject diary with you to each visit. 
 
STARTING WITH VISIT 2: 
• 
On visit days, do not apply any topical products (e.g., moisturizers, sunscreens) to the 
Target and Non-Target Warts, except for routine cleansing products, within 12 hours 
prior to the visit 
• 
After any study visit where a study medication treatment occurred do not: 
o Wash/submerge the warts for at least 6 hours after the treatment 
o Apply any topical products to the wart for at least 6 hours 
o Occlude, bandage or otherwise cover the wart treatment area (loose-fitting clothing is 
permissible) for at least 6 hours. 
 
STUDY MEDICATION:  The study medication provided to you is only to be used as instructed.   
Please ask your doctor or staff if you have any questions about its use. 
 
STUDY VISIT SCHEDULE: 
VISIT 2: 
Date:                            Time: 
VISIT 3: 
Date:                            Time: 
VISIT 4: 
Date:                            Time: 
VISIT 5: 
Date:                            Time: 
VISIT 6: 
Date:                            Time: 
VISIT 7: 
Date:                            Time: 
VISIT 8: 
Date:                            Time: 
VISIT 9: 
Date:                            Time: 
VISIT 10: 
VISIT 11: 

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Date:                            Time: 
Date:                            Time: 
VISIT 12: 
Date:                            Time: 
VISIT 13: 
Date:                            Time: 
 
THANK YOU FOR FOLLOWING THESE INSTRUCTIONS 
 
 
On At Home Study Administration Days: 
 
• Do not apply any topical products (e.g., moisturizers, sunscreens) to the Target and 
Non-Target Warts, except for routine cleansing products, within 12 hours prior to the 
visit 
• 
After any study visit where a study medication treatment occurred do not: 
o 
Wash/submerge the warts for at least 6 hours after the treatment 
o 
Apply any topical products to the wart for at least 6 hours 
o 
Occlude, bandage or otherwise cover the wart treatment area (loose-fitting clothing 
is permissible) for at least 6 hours. 
 
At Home Study Medication Application: 
 
• Wash your hands prior to completing study medication treatment. 
• Wear safety glasses and the nitrile examination gloves during the treatment that were 
provided to you by your doctor.  Latex gloves are prohibited.  
• Visually inspect the applicator for damage. If the applicator appears damaged do not use 
it for the treatment. 
• Do not apply the study medications to eyes, nose, mouth, mucous membranes, or open 
wounds. 
• Thoroughly cleanse the Target/Non-Target Wart by firmly rubbing with a swab/wipe 
wetted with 70% isopropyl alcohol that was provided to you by your doctor. 
• Using firm pressure and with the tip of the applicator held over the wart, squeeze in the 
middle of the applicator to apply one drop of study medication onto the Target Wart.  
Using the smaller side of the applicator tip, firmly move the applicator around in a 
circular motion to fully saturate the lesion.  Apply the study medication for 
approximately 15 seconds. 
• Minimize exposure to the surrounding normal skin. 
• During the treatment process remove excess study medication from the surrounding skin 
using a clean absorbent wipe. 
• Ensure the each identified wart is fully saturated with study medication at the end of the 
approximately 15 second application. 
• Allow the treated wart to remain undisturbed for approximately 15 seconds. 
• After approximately 15 seconds repeat the approximately 15 second application 
process. 
• Repeat the application/waiting cycle until the study medication has been applied to each 
identified wart up to 3 times. 
• Absorb any remaining A-101 study medication and dry the Target Wart and the 
surrounding skin without wiping or  rubbing. 
• Document the number of times each identified wart is treated during a treatment.  

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• Dispose of the used applicator in the biohazardous containers and bags that were 
provided to you by your doctor. 
• Return used applicator in biohazardous bag to doctor at each visit. 
Diagram Showing the Process for Preparing A-101 Study Medication  
 
 
 
 
Step 1:  Hold the Study Medication    Step 2:  Crush the ampule in the 
applicator so that the applicator          applicator by applying pressure at  
cap is pointing up.                               the center of the barrel of the applicator. 
 
 
Step 3:  Remove the sleeve.         Step 4: Tap the barrel of the applicator 
                                                     to ensure the solution is free of the 
                                                      crushed ampule.     
 
 
Target Warts should be cleaned using an 
alcohol wipe prior to application of A-101 
Solution or matching Vehicle Solution.   
 
 

Protocol: A-101-WART-203 
Aclaris Therapeutics, Inc. 
 
 
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Version 3: 20 November 2017 
 
 
 
                                                                                                   
 
Step 5:  Gently remove the cap        Step 6:  Express a single drop of 
by twisting while pulling away        the Study Medication Topical Solution  
from the applicator.                          so that the tip of the applicator becomes wet. 
 

Protocol: A-101-WART-203 
Aclaris Therapeutics, Inc. 
 
 
Page 57 of 57 
Version 3: 20 November 2017 
 
 
 
                                                                                                   
 
16. 
References 
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