A Phase 2, Muti-Center Study of Repeat Dosing of Squaric Acid Dibutyl Ester in Subjects With Herpes Labialis
Phase: PHASE2
Conditions: Herpes Labialis, HSV
Sponsor: Squarex, LLC

 
Page 1 of 25 
 
 
 
 
 
 
 
 
A PHASE 2, MUTI-CENTER STUDY OF REPEAT DOSING OF SQUARIC ACID 
DIBUTYL ESTER IN SUBJECTS WITH HERPES LABIALIS 
 
Detailed Protocol 
 
Investigators:  
 
Mark Matson, MD 
Prism Research 
 
 
 
 
1000 Westgate Drive Suite 149 
 
 
 
 
St. Paul, MN 55114 
 
 
 
 
 
Maria Alora-Palli, M.D. 
Mass General Hospital 
Dermatology Associates, Suite 240 
50 Staniford Street 
Boston, MA, 02114 
 
Luis Aponte, M.D. 
International Research Partners, LLC 
3900 NW 79th Ave., Suite 520 
Doral, FL 33166 
 
 
 
 
Sponsor: 
 
 
Squarex, LLC 
 
Protocol Number: 
 
2017-SQX-P2c 
 
IND Number:  
 
118615 
 
NCT Number:  
 
NCT03521479 
 
Contacts: 
 
 
Hugh McTavish, Ph.D., J.D. 
Squarex, LLC 
7460 Pinehurst Road 
Pine Springs, MN 55115 
Tel. No. 651-492-0283 
hmctavish@squarex-pharma.com 
 
 
 
 
Version date: 19 December 2017 
 
 

2 
 
TABLE OF CONTENTS 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   Page 
                                                                                                                             
I. OBJECTIVE S  
....................................................................................................... 3 
 
II. BACKGROUND 
 ...................................................................................................... 3 
 
III.OUTCOMES 
 
 ...................................................................................................... 4 
 
IV.  SUBJECT SELECTION 
 
A.  
Inclusion Criteria    ....................................................................................... 4 
 
B.  
Exclusion Criteria    ...................................................................................... 4 
 
C.  
Treatment Groups  ........................................................................................ 5 
 
V.  SUBJECT ENROLLMENT 
 
A.  
Methods of enrollment    .............................................................................. 5 
 
B.  
Informed consent .......................................................................................... 6 
 
VI. STUDY PROCEDURES ............................................................................................. 6 
 
 
VII. RISKS AND DISCOMFORTS .................................................................................... 13 
 
 
VIII. POTENTIAL BENEFITS 
 
A.   
Potential benefits to subjects ...................................................................... 13 
 
B.   
Potential benefits to society ........................................................................ 13 
 
IX. MONITORING AND QUALITY ASSURANCE 
 
A.   
Study Drug Management ............................................................................. 14 
 
B.   
Data and Safety monitoring ......................................................................... 14 
 
C.   
Data and Drug Handling ............................................................................... 14 
 
D.   
Site Monitoring .............................................................................................. 14 
 
E.        Sponsor Monitoring ...................................................................................... 15 
 
F.   
Adverse Event reporting .............................................................................. 15 
 
X. STATISTICAL METHODS ........................................................................................... 16 
 
XI. References 
 
....................................................................................................... 18 
Appendix A: Provider Assessment of Local Irritation from Therapy ....................... 19 
Appendix B: Patient Assessment of Disease Severity and Local Irritation from 
Therapy ............................................................................................................................ 20 
Appendix C: Study Schema for all Groups (A, B, C, D) ............................................. 22 
Appendix D: Study Schema for Groups A and B..........  …………………………….   23 
Appendix E: Study Schema for Group C…….…………………………………………...24 
Appendix F: Study Schema for Group D…………………………………………   …….25 

3 
 
I. Objectives 
Primary Objective: To assess local and generalized adverse events with repeat topical 
application of 2% and 0.5% squaric acid dibutyl ester (SADBE) in subjects with frequent 
herpes labialis (4 or more episodes in the previous 12 months). 
  
Secondary Objective: To assess efficacy of repeat topical application of 2% and 0.5% 
SADBE in the prevention of herpes labialis episodes.   
 
II. Background 
Primary oral infection with the herpes simplex virus (HSV) typically occurs at a young age, is 
asymptomatic, and is not associated with significant morbidity. After primary oral infection, HSV 
may persist in a latent state in the trigeminal ganglion and later reactivate as the more common 
herpes labialis, or “cold sores.” Common triggers for reactivation are well known and include 
ultraviolet light, trauma, fatigue, stress, fever, inflammation, and menstruation. These lesions 
affect up to 45 percent of the U.S. population. They classically manifest as a well-localized cluster 
of small vesicles along the vermilion border of the lip or adjacent skin. The vesicles subsequently 
rupture, ulcerate, and crust within 24 to 48 hours. Spontaneous healing occurs over seven to 10 
days.  
In immunocompetent patients, herpes labialis usually is mild and self-limited. However, pain, 
swelling, and cosmetic concerns may prompt physician consultation. Orally administered antiviral 
agents, such as acyclovir (Zovirax) or valacyclovir (Valtrex), have a modest clinical benefit if 
initiated during the prodrome. Topical treatment with 1% penciclovir cream (Denavir) may reduce 
healing time and pain slightly, even if initiated after the prodrome. However, reduction in healing 
time with systemic or topical agents is modest. 
Squaric acid dibutyl ester (SADBE) is a topical immunotherapeutic agent used in the treatment of 
verruca vulgaris and alopecia areata. During a recent FDA Compounding Advisory Committee 
Meeting, it was recommended that squaric acid dibutylester be included on the list of bulk drug 
substances allowed for use in compounding under section 503A of the Federal Food, Drug, and 
Cosmetic Act.  And SADBE has now been so listed under section 503A. 
 A study completed by Lee et al of 29 patients with recalcitrant warts demonstrated complete 
clearance in 69% of patients with application every 2-4 weeks. Silverberg et al showed a 
complete clearance in 58% of patients (n=61) when SADBE was applied 3 times weekly.  
SADBE has also been used with some success in the treatment of alopecia areata. In a review of 
the literature, Rokhsar et al noted a 50% to 60% success rate of SADBE in use for hair re-growth 
in this population. 
SADBE has been reported to cause eczema, lymphadenopathy, blistering, allergic contact 
dermatitis, skin hypopigmentation, a burning sensation after application, and systemic reactions 
including fever and arthralgias. A study completed by Oglio et al of eight patients treated with 
SADBE for warts noted only mild and well tolerated side effects of erythema, desquamation, 
cutaneous edema, pruritus, burning, and pain.  
SADBE induces a delayed-type hypersensitivity response which in warts, is believed to induce 
the killing of virally infected cells by cytotoxic lymphocytes. This influx of lymphocytes into lesional 
tissue may also enhance the recognition and processing of viral antigens, leading to clonal 
expansion of effector cells. It is hoped that SADBE will offer subjects a safe and effective 
therapeutic option to decrease the frequency and severity of future herpes labialis outbreaks 
through these mechanisms.  

4 
 
A placebo-controlled clinical study completed at Massachusetts General Hospital showed that 
squaric acid prevented recurrence of herpetic lesions.  The effect of SADBE of delaying new 
herpes labialis outbreaks was highly significant (p<0.01) as compared to placebo.    (Throughout 
this document, where the term "squaric acid" is used, it refers to squaric acid dibutyl ester 
(SADBE).) 
III. Outcomes 
Primary Outcome Measure:  
Localized adverse events:  
 
Particularly, localized erythema, itching, and pain at the drug application site. 
 
General adverse events: 
Particularly, generalized allergic reaction, and any eczematous dermatitis anatomically 
distant from the drug application site and consistent with autosensitization, other than 
dermatitis of a herpes labialis lesion, that is assessed as possibly related to the study 
medication. 
 
Secondary Outcome measures: 
• 
Number of days until subject reported first new herpes labialis episode following the 
first dose on day 0. 
• 
Number of days until subject reported first new herpes labialis episode following the 
dose applied at the 9-week visit for groups A and B. 
 
 
IV. Subject Selection 
 
A. Inclusion criteria  
 
1. Age ≥ 18 and ≤ 65 
2. Clinical diagnosis of herpes labialis, which may be made at the screening visit based 
on the patient's self-reported history of symptoms.  An active herpes labialis outbreak 
at the time of entry into the clinical trial will neither be required nor will be an exclusion 
criterion. 
3. Self report having four (4) or more episodes of herpes labialis in the past 12 months.    
Subjects will NOT be told that four-or-more episodes in the previous 12 months is the 
entry criterion.  Subjects will be asked "How many separate episodes of cold sores 
have you had in the previous 12 months?"  They will be included if they give an answer 
of four or more and excluded if they give an answer of three or fewer.    
4. At least half of the subject's episodes of the previous 12 months should be vesicular in 
nature and at least half preceded by prodromal symptoms. Prodromal symptoms may 
include tingling, itching, burning or pain before the development of a herpetic lesion. 
    
 
B. Exclusion criteria 
 
1. Pregnant or lactating females.  
2. Current or recurrent non-herpetic infection or any underlying condition that may 
predispose to infection or anyone who has been admitted to the hospital due to 
bacteremia, pneumonia or any other serious infection in the last 12 months. 
3. Therapy with glucocorticoid or immunosuppressants at time of recruitment or within 
past 4 weeks prior to the screening visit, or at any time during the study (including 
inhaled corticosteroids for asthma), except for topical steroids in sites other than face.  
4. History of malignancy (except patients with surgically cured basal cell or squamous cell 
skin cancers). 
5. History of organ transplantation. 

5 
 
6. HIV-positive status determined by history at screening or known history of any other 
immunosuppressive disease. 
7. Severe co-morbidities (CHF [NYHA class II or worse], MI, CVA or TIA) within 3 months 
of screening visit, current unstable angina pectoris or oxygen-dependent severe 
pulmonary disease.  
8. Known hypersensitivity to Dimethyl sulfoxide (DMSO). 
9. Any condition judged by the investigator to cause this clinical trial to be detrimental to 
the patient. 
10. Subject is currently enrolled in another investigational device or drug trial(s), or subject 
has received other investigational agent(s) within 28 days of the screening visit. 
11. Previous exposure to SADBE (squaric acid or squaric acid dibutyl ester). 
12. Subject has an abnormal skin condition (e.g., acne, eczema, rosacea, psoriasis, 
albinism, or chronic vesiculo-bullous disorder) that occurs in the area ordinarily affected 
by herpes labialis 
13. Subject has an abnormal skin condition (e.g., eczema, rosacea, psoriasis, albinism, or 
chronic vesiculo-bullous disorder) that occurs in the inner aspect of either upper arm 
(the area where drug will be applied). 
14. Subject has had a vaccine for either HSV-1 or HSV-2.   
15. Subject has had treatment with anti-viral therapy (including ABREVA) within 2 weeks 
before first dose of SADBE or at any time during the study.  
 
C. Treatment Groups 
 
 
 
Subjects will receive on a double blind basis one of two treatment regimens: 
• 
Group A: 15 subjects, treated with 2% SADBE on day 0 and with 2% SADBE on the 
visits at week 3, week 6, week 9, and month 8.   
• 
Group B: 15 subjects, treated with 2% SADBE on day 0 and with 0.5% SADBE on 
the visits at week 3, week 6, week 9, and month 8. 
And subjects will be recruited on an open label basis to two other treatment regimens: 
• 
Group C: 15 subjects, treated with 2% SADBE on day 0, month 3, and month 6. 
• 
Group D: 15 subjects, treated with 2% SADBE on day 0 and month 6. 
 
The blind only applies between groups A and B.  A subject and the site personnel will know which 
subjects are in group C and group D, and will know that a subject is in either group A or B, but not 
whether the subject is in group A or is in group B.  
 
V. Subject Enrollment 
 
Preliminary eligibility will be determined based on study staff interviews of interested subjects 
over the phone. Eligible subjects will then be scheduled for a screening visit. Sixty (60) subjects 
overall will be enrolled.   
 
A. Methods of Enrollment 
 
 
 
All subjects who sign an informed consent form (ICF) and are screened will be documented on 
the enrollment log. A note will be made in the source documentation verifying that the subject has 
willingly signed the ICF prior to participation in any study procedures. All enrolled subjects will 
receive a subject number to ensure their protected health information (PHI) and subject 
anonymity.  
 
Adult men and women of any race or and ethnic group may participate in this study.  
 
Women of childbearing potential must agree to use adequate birth control while in the study and 
for a period of one month after use of the study medication. Examples of acceptable 
contraceptive methods include, abstinence, oral contraceptives, implantable hormonal 
contraceptives, or double barrier methods. 
 

6 
 
No minors (i.e., <18 years of age) will be included in this study. 
 
 
 
B. Informed Consent 
 
The Investigator or designee will inform the potential study subject of all aspects of the study 
and answer all their questions. If the subject agrees to be a study subject, they will document 
their consent in writing by signing an ICF. If a subject needs more time to think about study 
participation, they will be given a copy of the consent and sign it upon return if they elect to 
participate. The investigator is responsible for using a consent form that has been approved 
by the IRB and is the most current version. If a new version of the consent form is approved 
by the IRB while a subject is in the treatment portion of the study, then the investigator or 
designee will inform the subject of the changes and, if the subject agrees to continue 
treatment, both the investigator and subject should sign the updated form.  
 
VI. Study Procedures 
Screening Visit (Day 0) (Groups A, B, C, and D) 
 
During the screening visit, the investigator will discuss with each subject the nature of the study, its 
requirements and its restrictions.  
 
The following will be performed:  
• 
Review and sign ICF 
• 
Medical history and demographics  
• 
Physical examination (targeted skin examination) and vital signs (oral temp, blood 
pressure, heart rate, respiration rate after resting supine for 5 minutes) 
• 
Urine pregnancy test (for female participants of childbearing potential)  
• 
Review of concomitant medications 
• 
Review of inclusion/exclusion criteria 
• 
Diary distribution and explanation and explanation of the need for subjects to 
complete paper or electronic diaries during each day of the study during which they 
are experiencing a herpes labialis outbreak or redness, irritation, or rash at the drug 
application site. 
• 
Explanation of the need for subjects to take digital photographs with their own smart 
phones or digital cameras of affected areas of their face on each day of the study 
that they are experiencing a herpes labialis outbreak and to take photographs of the 
drug application site on each day of the study during which they are experiencing 
redness, rash, or irritation at the drug application site.   
• 
Blood collection 
o 
3 ml EDTA whole blood collected for CBC with differential   
o 
10 ml serum collected for anti-HSV-1 and anti-HSV-2 IgG assays. 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
• 
Targeted skin exam (at drug application site). Exclude the subject from the study if the 
subject is experiencing any redness, rash, or irritation at the drug application site before 
drug application.  
• 
Adverse events collection.  
• 
When all Inclusion and Exclusion Criteria has been reviewed and the subject meets 
eligibility requirements, the subject will then be permitted to receive study medication. 
• 
SADBE application (2% SADBE solution for all subjects) on the inner aspect of the left 
upper arm (application of Dose 1, from a vial labeled xxx-1 for Dose 1 to patient number 
xxx). The drug solution (supplied by Squarex) is topically applied to the inner aspect of 
the upper left arm of the subject and covered with Tegaderm.  The drug application 

7 
 
area should be approximately 1 cm in diameter. (Subsequent doses will be applied on 
alternate arms to maximize time between applications to the same spot.)  Subject is 
advised to remove the Tegaderm and rinse and wipe off the application spot with a wet 
paper towel 6-12 hours after drug application and then dry the application spot.  When 
applying the drug solution, the cotton swab should be rested in the drug solution vial 
and the vial and swab weighed together on a scale with precision to 0.0001 grams 
immediately before dosing.  Immediately after dosing, the swab is placed in the same 
vial again on the scale and the weight measured again.  The weights before and after 
drug application are recorded.  The difference in weight is the weight of drug solution 
applied.  Investigators should attempt to apply 20-30 mg of drug solution.     
 
 
Day 3 (3 days after the Day 0 visit) (Groups A, B, C, and D) 
The following procedures will be performed during this visit: 
 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) (Score for erythema at drug application 
site on a 0-3 scale.) 
• 
Photograph the drug application site. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection. (Query subject to score pain at drug application site, 
itching at drug application site, and redness at drug application site, each on a 0-3 
scale, as in the subject diary.)  
 
3 weeks (Day 21 ±3) (Groups A and B only) 
The following procedures will be performed during this visit: 
 
• 
Urine pregnancy test (for female participants of childbearing potential)  
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) 
• 
Photograph the drug application site if the subject is experiencing any redness, rash, 
or irritation at the drug application site at the time of the clinic visit. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection.  
• 
SADBE application (2% or 0.5% on double blind basis) on the inner aspect of the right 
upper arm (application of Dose 2, from a vial labeled xxx-2 for Dose 2 to patient number 
xxx). The drug solution (Supplied by Squarex) is topically applied to the inner aspect 
of the upper right arm of the subject and covered with Tegaderm.  Subject is advised 
to remove the Tegaderm and rinse and wipe off the application spot with a wet paper 
towel 6-12 hours after drug application and then dry the application spot.  When 
applying the drug solution, the cotton swab should be rested in the drug solution vial 
and the vial and swab weighed together on a scale with precision to 0.0001 grams 
immediately before dosing.  Immediately after dosing, the swab is placed in the same 
vial again on the scale and the weight measured again.  The weights before and after 
drug application are recorded.  The difference in weight is the weight of drug solution 
applied.     

8 
 
 
 
 
3 weeks plus 3 days (3 days after the 3-week visit) (Groups A and B only) 
The following procedures will be performed during this visit: 
 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) (Score for erythema at drug application 
site on a 0-3 scale.) 
• 
Photograph the drug application site. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection. (Query subject to score pain at drug application site, 
itching at drug application site, and redness at drug application site, each on a 0-3 
scale, as in the subject diary (see Appendix B). 
 
6 weeks (Day 42 ±3) (Groups A and B only) 
The following procedures will be performed during this visit: 
 
• 
Urine pregnancy test (for female participants of childbearing potential)  
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) 
• 
Photograph the drug application site, if the subject is experiencing any redness, rash, 
or irritation at the drug application site at the time of the clinic visit. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection.  
• 
SADBE application (2% or 0.5% on double blind basis) on the inner aspect of the left 
upper arm (application of Dose 3, from a vial labeled xxx-3 for Dose 3 to patient number 
xxx). The drug solution (Supplied by Squarex) is topically applied to the inner aspect 
of the upper left arm of the subject and covered with Tegaderm.  Subject is advised to 
remove the Tegaderm and rinse and wipe off the application spot with a wet paper 
towel 6-12 hours after drug application and then dry the application spot.  When 
applying the drug solution, the cotton swab should be rested in the drug solution vial 
and the vial and swab weighed together on a scale with precision to 0.0001 grams 
immediately before dosing.  Immediately after dosing, the swab is placed in the same 
vial again on the scale and the weight measured again.  The weights before and after 
drug application are recorded.  The difference in weight is the weight of drug solution 
applied.     
 
 
6 weeks plus 3 days (3 days after the 6-week visit) (Groups A and B only) 
The following procedures will be performed during this visit: 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) (Score for erythema at drug application 
site on a 0-3 scale.) 
• 
Photograph the drug application. 

9 
 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection. (Query subject to score pain at drug application site, 
itching at drug application site, and redness at drug application site, each on a 0-3 
scale, as in the subject diary.) 
 
9 weeks (Day 63 ±3) (Groups A and B only) 
The following procedures will be performed during this visit: 
• 
Urine pregnancy test (for female participants of childbearing potential)  
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak, 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) 
• 
Photograph the drug application site if the subject is experiencing any redness, rash, 
or irritation at the drug application site at the time of the clinic visit. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection.  
• 
SADBE application (2% or 0.5% on double blind basis) on the inner aspect of the right 
upper arm (application of Dose 4, from a vial labeled xxx-4 for Dose 4 to patient number 
xxx). The drug solution (Supplied by Squarex) is topically applied to the inner aspect 
of the upper right arm of the subject and covered with Tegaderm.  Subject is advised 
to remove the Tegaderm and rinse and wipe off the application spot with a wet paper 
towel 6-12 hours after drug application and then dry the application spot.  When 
applying the drug solution, the cotton swab should be rested in the drug solution vial 
and the vial and swab weighed together on a scale with precision to 0.0001 grams 
immediately before dosing.  Immediately after dosing, the swab is placed in the same 
vial again on the scale and the weight measured again.  The weights before and after 
drug application are recorded.  The difference in weight is the weight of drug solution 
applied.     
 
 
9 weeks plus 3 days (3 days after the 9-week visit) (Groups A and B only) 
The following procedures will be performed during this visit: 
 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak, 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) (Score for erythema at drug application 
site on a 0-3 scale.) 
• 
Photograph the drug application site. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection. (Query subject to score pain at drug application site, 
itching at drug application site, and redness at drug application site, each on a 0-3 
scale, as in the subject diary.) 
• 
Blood collection 
o 
3 ml EDTA whole blood collected for CBC with differential. 
 
 
 

10 
 
3 months (3 months after day 0 ±7 days) (Group C only) 
The following procedures will be performed during this visit: 
• 
Urine pregnancy test (for female participants of childbearing potential)  
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak, 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) 
• 
Photograph the drug application site if the subject is experiencing any redness, rash, 
or irritation at the drug application site at the time of the clinic visit. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection.  
• 
SADBE application (2% SADBE) on the inner aspect of the right upper arm. The drug 
solution (Supplied by Squarex) is topically applied to the inner aspect of the upper right 
arm of the subject and covered with Tegaderm.  Subject is advised to remove the 
Tegaderm and rinse and wipe off the application spot with a wet paper towel 6-12 hours 
after drug application and then dry the application spot.  When applying the drug 
solution, the cotton swab should be rested in the drug solution vial and the vial and 
swab weighed together on a scale with precision to 0.0001 grams immediately before 
dosing.  Immediately after dosing, the swab is placed in the same vial again on the 
scale and the weight measured again.  The weights before and after drug application 
are recorded.  The difference in weight is the weight of drug solution applied.     
 
 
3 months plus 3 days (3 days after the 3-month visit) (Group C only) 
The following procedures will be performed during this visit: 
 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak, 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) (Score for erythema at drug application 
site on a 0-3 scale.) 
• 
Photograph the drug application site. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection. (Query subject to score pain at drug application site, 
itching at drug application site, and redness at drug application site, each on a 0-3 
scale, as in the subject diary.) 
 
6 months (6 months after day 0 ±7 days) (Groups C and D only) 
The following procedures will be performed during this visit: 
 
• 
Urine pregnancy test (for female participants of childbearing potential)  
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) 
• 
Photograph the drug application site if the subject is experiencing any redness, rash, 
or irritation at the drug application site at the time of the clinic visit. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 

11 
 
• 
Adverse events collection.  
• 
SADBE application (2% SADBE) on the inner aspect of the upper arm. The drug 
solution (Supplied by Squarex) is topically applied to the inner aspect of the subject’s 
(upper left arm for Group C, or the upper right arm for Group D) and is then covered 
with Tegaderm.  Subject is advised to remove the Tegaderm and rinse and wipe off 
the application spot with a wet paper towel 6-12 hours after drug application and then 
dry the application spot.  When applying the drug solution, the cotton swab should be 
rested in the drug solution vial and the vial and swab weighed together on a scale with 
precision to 0.0001 grams immediately before dosing.  Immediately after dosing, the 
swab is placed in the same vial again on the scale and the weight measured again.  
The weights before and after drug application are recorded.  The difference in weight 
is the weight of drug solution applied.     
 
6 months plus 3 days (3 days after the 6-month visit) (Groups C and D only) 
The following procedures will be performed during this visit: 
 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) (Score for erythema at drug application 
site.) 
• 
Photograph the drug application site. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection. (Query subject to score pain at drug application site, 
itching at drug application site, and redness at drug application site, each on a 0-3 
scale, as in the subject diary.)  
• 
Blood collection 
o 
3 ml EDTA whole blood collected for CBC with differential. 
 
7 months (30 days ±7 days after the 6-month visit) (Groups C and D only) (End of Study 
visit for Groups C and D) 
The following procedures will be performed during this visit: 
 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) 
• 
Photograph the drug application site. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Adverse events collection. 
• 
Blood collection 
o 
3 ml EDTA whole blood collected for CBC with differential. 
  
8 months (8 months after day 0 ±14 days) (Groups A and B only) 
The following procedures will be performed during this visit: 
 
• 
Urine pregnancy test (for female participants of childbearing potential)  
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) 

12 
 
• 
Photograph the drug application site if the subject is experiencing any redness, rash, 
or irritation at the drug application site at the time of the clinic visit. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection.  
• 
SADBE application (2% or 0.5% on double blind basis) on the inner aspect of the upper 
arm (application of Dose E, from a vial labeled xxx-E for Dose E to patient number 
xxx). The drug solution (Supplied by Squarex) is topically applied to the inner aspect 
of the upper left arm of the subject and covered with Tegaderm.  Subject is advised to 
remove the Tegaderm and rinse and wipe off the application spot with a wet paper 
towel 6-12 hours after drug application and then dry the application spot.  When 
applying the drug solution, the cotton swab should be rested in the drug solution vial 
and the vial and swab weighed together on a scale with precision to 0.0001 grams 
immediately before dosing.  Immediately after dosing, the swab is placed in the same 
vial again on the scale and the weight measured again. The weights before and after 
drug application are recorded.  The difference in weight is the weight of drug solution 
applied.  
 
8 months plus 3 days (3 days after the 8-month visit) (Groups A and B only) 
The following procedures will be performed during this visit: 
 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) (Score for erythema at drug application 
site.) 
• 
Photograph the drug application site. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection. (Query subject to score pain at drug application site, 
itching at drug application site, and redness at drug application site, each on a 0-3 
scale, as in the subject diary.)  
 
9 months (30 days ±7 days after the 8-month visit) (Groups A and B only) (End of Study 
visit for Groups A and B) 
The following procedures will be performed during this visit: 
 
• 
Query subject if the subject is currently having a herpes labialis (cold sore) outbreak 
or has since the previous clinic visit. 
• 
Targeted skin exam (at drug application site) 
• 
Photograph the drug application site. 
• 
Collection of photographs and diaries from subject. 
• 
Vital Signs 
• 
Review of concomitant medications 
• 
Adverse events collection.  
• 
Blood collection 
o 
3 ml EDTA whole blood collected for CBC with differential. 
 
 
 
 

13 
 
Photographs 
Digital photographs of the drug application site of each patient will be taken by clinic staff at each 
clinic visit during which a patient has any erythema or other localized adverse event at the study 
drug application site.  Photographs of the drug application site will also be taken at each clinic 
visit 3 days after a drug application, regardless of whether the subject is then experiencing any 
erythema or other localized adverse event at the study drug application site.     
In addition, patients will be asked to use their own smart phones or digital cameras to photograph 
the site of drug application when they experience any redness, rash, or irritation at that site.  
Those photographs should be taken once per day on any day they are experiencing rash, 
redness, or irritation at the drug application site and on the first day after rash, redness, or 
irritation have resolved. 
 
Patient Contacts and Monitoring and Patient Diaries 
At the initial visit, patients will be given paper journals or instructed on electronic journals, which 
will be available through a website.  Patients will be contacted weekly by text message, E-mail 
message or phone call. Each patient will be asked if he or she experienced a new outbreak and if 
her or she experienced any adverse events.  Each patient will be reminded to fill out his or her 
diary on any day that he or she experienced an outbreak or an adverse event.   
 
All patients will be instructed to fill out their diaries at least weekly, even if they have not had an 
outbreak or adverse event to document the lack of outbreaks and adverse events. 
 
VII. Risks and discomforts 
Possible side effects of squaric acid dibutyl ester include: 
 
1. Localized erythema 
2. Increasing lesional inflammation. 
3. Pruritus  
4. Contact dermatitis 
5. Lymphadenopathy 
6. Vitiligo or leukoderma  
7. Generalized allergic reaction 
8. Blistering 
9. Burning sensation with application 
10. Fever 
11. Arthralgias 
 
VIII. Potential Benefits 
A. Potential benefits to subjects 
 
Subjects may or may not benefit from participating in the study.  
 
 
 
B. Potential benefits to society 
 
Information gathered from this study may help other people in the future with herpes labialis. 
 
 
 

14 
 
IX. Monitoring and Quality Assurance 
 
Written informed consent will be obtained from each subject at the initiation of the screening visit.  
In all cases, the consent will be witnessed by an appropriate health care professional. A copy of 
the signed consent form will be given to the subject to keep. All efforts will be made to insure the 
privacy rights of the study subject.  
 
A. Study Drug Management 
 
Study medication will be provided by Squarex and shipped directly to the clinical site. 
 
All study medications will be retained in secure and restricted access storage by the Investigator’s 
designee for the duration of the study. All study medication will be stored frozen (-15 to -25ºF or  
-26 to -32ºC).  Each dose of study medication should be removed from the freezer and placed at 
room temperature one business day before the appointment of the patient for that dose of study 
medication.  If the patient cancels the appointment, the thawed dose of study medication should 
continue to be stored at room temperature for up to 3 months.  Controlled access to study 
medications will be maintained until Squarex, Inc. has completed final drug accountability and 
provided instructions for drug return and destruction. 
 
 
 
B. Data and Safety Monitoring Plan 
 
This study is considered to be moderate risk to human subjects as the study drug is not FDA 
approved, but is commonly used for treatment of warts and alopecia areata. 
 
C. Data and Drug Handling Guidelines 
 
Data will be transcribed to an Electronic Case Report Form (ECRF) and will be complete and 
accurate based on available source documentation.  Corrections of data will be made in a 
manner that allows Squarex to track changes according to FDA regulations. The investigator will 
respond to inquiries regarding data errors, inconsistencies, and missing data in a timely fashion.   
 
The study site will keep all study records, including source docs, CRFs, signed ICFs, regulatory 
papers, patient logs, drug accountability logs, etc. until Squarex determines that they can be 
returned or destroyed.  The investigator will follow the procedures outlined in the protocol and 
discuss any deviations with Squarex.   
Site Monitoring of Source Data 
 
The principal investigator and members of the study staff, not directly involved in clinical 
assessments or clinical study procedures, will monitor the study. All data relevant to the 
assessments outlined in this protocol will be recorded in the case report form (ECRF) and the 
subject’s sourcebook. 
 
The original case report form for each subject will be audited to source documents at the study 
site by the study monitor. The study staff monitor will review the progress of the study to ensure 
proper study conduct and accurate data collections through ongoing reviews of Case Report 
Forms, clinical records, and administrative documents. Reviews will be made at least once a 
month.  
  
 
 
 
 

15 
 
D. Sponsor Monitoring of Study Data 
 
Representatives of Squarex will also monitor this study’s data regularly via scheduled monitoring 
visits. Monitoring procedures include pre-study preparations, site initiation visit, interim monitoring 
visits, and study close-out preparations and visits. During sponsor’s visits, the Investigator will 
provide Squarex’s monitors with access to all protocol regulatory documents, all medical data 
collected on the participating subjects, screening logs, enrollment logs, drug accountability logs 
and the drug supply, case report forms, signed informed consent forms, and any other 
information that Squarex may consider to be necessary to evaluate the safety of the 
investigational product and patient safety.   Both the monitors and study staff will review the 
accuracy and completeness of case report form entries, all log entries, source documents, and 
informed consent documents.    
 
E. Adverse event reporting guidelines 
 
Definitions 
 
Adverse Event (AE) is any untoward medical occurrence in a subject that does not necessarily 
have a causal relationship with this treatment. An AE can therefore be any unfavorable and 
unintended sign, symptom, or disease temporally associated with the use of an investigational 
product, whether or not related to the investigational product. 
 
Serious Adverse Event (SAE) is any untoward medical occurrence that: 
• 
Results in death, 
• 
Is life-threatening, 
• 
Requires inpatient hospitalization or prolongation of existing hospitalization, 
• 
Results in persistent or significant disability or incapacity, 
• 
Is a congenital anomaly/birth defect, or 
• 
Is another medically important condition 
 
 
Reporting and Documenting Adverse Events 
 
All untoward medical occurrences that occur after the subject signs a consent form should be 
documented as an AE. The Investigator should ensure that all events that occur during the study 
period are recorded. All AEs should be followed until resolution or until, in the Investigator’s 
judgment, they are chronic and stable. If an emergency situation should occur, appropriate 
medical measures should be taken to stabilize the subject. 
 
General adverse events will be elicited by the physician and his or her staff through examination 
and general interview. Adverse events specific to evaluating the primary outcome of the study 
(e.g., localized erythema, itching, and pain at the drug application site) will be captured through 
examination and direct questioning. For example, a subject will be asked, “Have you had any 
redness around the area where the medication was applied?” Subjects will be asked to complete 
a weekly entry into an electronic or paper diary where information on the occurrence or 
nonoccurrence of specific application-site adverse events will be recorded. 
 
Documentation of AEs includes: date and time of onset and resolution of AE, intensity, frequency, 
seriousness, related interventions and outcome. The Investigator must also evaluate the 
probability of a causal relationship of the AE to the study treatment as being: “definite, probable, 
possible, unlikely, or unrelated.” Intensity of adverse events will be graded as mild, moderate, or 
severe according to the following criteria: 
 
Mild: symptoms that are easily tolerated and transient in nature with minimal or no impairment of 
normal activity 
Moderate: symptoms that are poorly tolerated, are sustained, and interfere with normal activity 

16 
 
Severe: symptoms that are incapacitating and render the subject unable to work or participate in 
many or all usual activities 
 
All SAEs will be reported to the IRB according to the IRB’s requirements. They will also be 
reported to the study sponsor and FDA according to regulatory guidelines. 
 
 
Study Discontinuation 
 
At any time after enrollment, a subject may be discontinued. Reasons for discontinuation of a 
subject from the study will include, but may not be limited to, the following: 
• 
Subject is found to be intolerant to a required study procedure at any time point 
• 
Subject experiences a serious adverse experience at any time point.  
• 
Subject develops an inter-current illness that would, in the judgment of the investigator, 
affect assessments of clinical status to a significant degree.  
• 
Subject begins a medication that, in the judgment of the investigator, may affect 
assessments of clinical status to a significant degree. 
• 
Subject becomes pregnant while participating in the study 
• 
Subject enrolls in another investigational study 
• 
Subject requests to withdraw from the study 
• 
Subject who is non-compliant with study specific visits 
• 
The study sponsor decides to suspend or terminate the study. 
 
Subjects will be discontinued from the study if they have a moderate or severe rash at a drug 
application site (score of 2 or 3 on Patient Assessment for pain or redness, but not itching, or 
score of 2 or 3 for erythema on Provider Assessment on a scale of 0-3) at any time, if they have 
any SAE, and if they have any generalized allergic reaction assessed as possibly related to the 
study medication or any eczematous dermatitis anatomically distant from the drug application site 
and consistent with autosensitization, other than dermatitis of a herpes labialis lesion, that is 
assessed as possibly related to the study medication.  Discontinued subjects will be followed until 
the adverse event resolves. 
 
X. STATISTICAL METHODS 
 
A brief overview of the statistical analysis plan is presented below. Complete details of the planned 
analysis will be documented in a full Statistical Analysis Plan, which will be finalized before locking 
the study database. 
 
Statistical analyses will be performed using SAS software. Default estimation methods in version 
9.4 of SAS are always used unless an alternative is specified below. In general, data summaries 
will include the mean, standard deviation, median, minimum and maximum values for continuous 
data (e.g., changes in CBC measurements); the median, 25th and 75th percentiles, minimum and 
maximum values for time-to-event endpoints (e.g., number of days until subject reported first new 
herpes labialis episode following the first dose on day 0); and the number and percentage of 
patients in each category for categorical data (e.g., number of subjects experiencing specific 
adverse events). Pointwise 95% confidence intervals (CI) will also be estimated for the mean 
(continuous data), median (time-to-event endpoints) or percentage of patients (categorical data). A 
series of power transformations (including the log transformation) may be applied to observed 
values of continuous outcome measures if the distribution of raw (i.e., untransformed) data to not 
appear to follow a normal distribution. 
 
There is no plan for case-control matching that would permit pairing of subjects between the four 
treatment arms. Therefore, unpaired data analyses will be performed on screening data across the 
four groups. Analysis of variance (ANOVA) models will be fit to numeric outcome measures such 
as serum cytokine levels. Any categorical outcome measures will be summarized using within-
group frequency tables. 

17 
 
 
Longitudinal data from patients (screening to the end of study) will be analyzed using appropriate 
statistical techniques appropriate for paired observations such as mixed-model for repeated 
measures to estimate 95% confidence intervals for the difference between screening and follow-
up values. 
 
The Sponsor plans to perform an interim data analysis after the week 9 visits.  The blind will be 
maintained for the site personnel and patients until the end of the study.  (The blind only applies 
between groups A and B.  A subject and the site personnel will know which subjects are in group 
C and group D, and will know that a subject is in either group A or B, but not whether the subject is 
in group A or in group B.) 
 
 
Sample Size 
 
The primary and secondary objectives of this study will be addressed with descriptive statistics and 
subjective comparisons of outcome measures between the four groups and within each group from 
screening to the end of follow-up for each subject. Although statistical methods will be employed to 
estimate means, variances and confidence intervals, no formal statistical hypotheses will be tested. 
Therefore, the sample size of 15 subjects per group (60 subjects total) was selected purely based 
on clinical judgement. 
 
Safety Analyses 
 
Reported adverse event (AE) terms will be mapped to MedDRA preferred terminology. All reported 
events will appear in AE listings, however only treatment-emergent adverse events will be 
summarized. A treatment-emergent adverse event (TEAE) is an AE that starts or increases in 
severity any time after the first application of any study drug up to 30 days following the last 
application of any study drug. 
 
Reported adverse event (AE) terms will be mapped to MedDRA preferred terminology. All reported 
events will appear in AE listings, however only treatment-emergent adverse events will be 
summarized. A treatment-emergent adverse event (TEAE) is an AE that starts or increases in 
severity any time after the first application of any study drug up to the time the patient withdraws 
from the study and, if the patient withdraws from the study within 30 days after any application of 
study drug, then for a minimum of 30 days following the last application of any study drug.  
 
Incidence rates of treatment-emergent adverse events will be summarized within treatment group 
at the MedDRA preferred term and primary system organ class levels. Similar summaries will be 
made for subsets of AEs such as (1) those judged by the Investigator to be related to study 
treatment, and (2) serious adverse events (SAEs). Other routine safety assessments (e.g., clinical 
laboratory parameters and vital signs) will be summarized by standard deviation, median, minimum 
and maximum observed values and changes from baseline values. NCI-CTCAE severity grades 
for laboratory parameters and other endpoints measured on an ordinal categorical scale may be 
summarized using shift tables (a two-way frequency table pairing baseline value with the most 
extreme post-baseline result). 
 
 
References 
 
1. Lee AN, Mallory SB. Contact immunotherapy with squaric acid dibutyl ester for the treatment 
of recalcitrant warts. J Am Acad Dermatol 1999;41(4): 595-599. 
2. Rokshar CK, Shupak JL, Vafai JJ, Washenik K. Efficacy of topical sensitizers in the treatment 
of alopecia areata. J Am Acad Dermatol 1998; 39(5)751-761 

18 
 
3. Silverberg NB, Lim JK, Paller AS, Mancini AJ. Squaric acid for immunotherapy for warts in 
children. J Am Acad Dermatol 2000;42:803-808. 
4. Millican EA, Conley JA, Sheinbein D. Cutaneous lymphoid hyperplasia related to squaric acid 
dibutyl ester. J Am Acad Dermatol 2011; 65(1): 230-231. 
5. Yue L. Testing Multiple Secondary Endpoints in Confirmatory Comparative Studies – A 
Regulatory Perspective. Presented at: 2nd Annual AdvaMed Statistical Issues for Medical 
Devices and Diagnostics; April 29, 2009; Bethesda, MD. Available at: 
http://www.advamedmtli.org/download/File/Statistics_April_2009/Yue_lilly_pres.pdf. 
Accessed February 5, 2015. 
6. Koch GG, Gansky SA. Statistical Considerations for Multiplicity in Confirmatory Protocols. 
Drug Information J. 1996;30:523-533. Available at: 
http://ferran.torres.name/download/shared/general/Multiplicity%20dj302612.pdf. Accessed 
February 5, 2015. 
 
 
 
 
 

19 
 
Appendix A.   
 
Subject #: 
 
 
Month          Day              Year     
Subject Initials:  
 
 
Visit Date:  
   
   
 
 
 
Provider Assessment of Local Irritation from Therapy 
 
1.  Please assess for local irritation from therapy. Please circle the choice that most accurately 
describes the treatment response: 
0 = no rash, 
1 = mild rash 
2 = moderate rash 
3 = severe rash in need of treatment with topical hydrocortisone 
 
 
 
 
________________________________________________ 
_______________ 
Signature 
 
 
 
 
 
 
Date 
 
 
 

20 
 
Appendix B 
Subject #: 
 
 
Month          Day              Year     
Subject Initials:  
 
 
Date:  
   
   
 
 
 
 
 
 
 
 
 
Patient Assessment of Disease Severity and Local Irritation from 
Therapy: please encircle your answers. 
 
1. Please assess for local irritation from therapy at the drug application site on your arm; 
0 = no rash (redness) 
1 = mild rash (redness) 
2 = moderate rash (redness) 
 
3 = severe rash (redness)  
 
2. Please assess for local irritation from therapy at the drug application site on your arm; 
0 = no pain 
1 = mild pain 
2 = moderate pain 
 
3 = severe pain 
 
 
3. Please assess for local irritation from therapy at the drug application site on your arm; 
0 = no itching 
1 = mild itching 
2 = moderate itching 
 
3 = severe itching 
 
4. Do you have any HSV lesions present:     Yes               No 
 
5. Location of lesions (please label the following):    
 
 
 
6.  Redness at HSV lesion:  
0 = no redness  
1 = faint pink 
2 = red 
3 = purple 
 
7. Pain at HSV lesion: 
0 = no pain 
1 = mild pain 
2 = moderate pain 
3 = severe pain 
 
8. Tingling at HSV lesion: 
0 = no tingling 
1 = mild tingling 
2 = moderate tingling 
3 = severe tingling 
 

21 
 
9.  Nature of HSV lesion (check all that apply): 
a. prodrome (tingling, no visible rash) 
b.  erythema (redness)  
c. papule (raised skin) 
d. vesicle (fluid-filled raised skin) 
e. erosion or ulcer (open sore)  
f. crust (dry sore)  
g. normal skin 
 
 
 
 
 
 
 
 
Signature: _______________________ 

22 
 
Appendix C: SQX P2c Study Schema for all Groups (A, B, C, D) 
 
Groups 
A, B,  
C, D 
 
 
A, B, 
C, D 
 
 
A, B 
A, B 
A,B 
A, B 
A, B 
A, B 
C 
C 
C, D 
C, D 
End 
Study  
C, D 
A, B 
A, B 
End 
Study 
A, B 
Schedule of 
Procedures 
Screening 
Day 0  
Week 0 
Follow-up 
3 Days 
after Wk 0 
 
Week 3  
Week 3  
Follow-up: 
3 days 
after Wk 3  
Week 6  
Week 6   
Follow-up:  
3 days 
after Wk 6 
Week 9  
Week 9 
Follow-up: 
3 days 
after Wk 9 
Month 3  
Month 3 
Follow-up:  
3 days 
after 
Month 9 
Month 6  
Month 6 
Follow-up:  
3 days after 
Month 6 
Month 7  
 
Month 8   
Month 8 
Follow-up:  
3 days after 
Month 8 
Month 9  
 
Informed Consent 
X 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Inclusion/ Exclusion 
X 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
History/Demographics 
X 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Physician 
Assessments  
(Targeted Skin Exam)  
 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Urine Pregnancy Test 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
 
 
X 
 
 
Vital Signs 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Photography 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
 
Diary Distribution/ 
Instruction 
X 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Instruction for taking 
Self-photographs 
X 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Collect Photographs  
 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Collect Diary 
 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Blood Collection  
(Processing, storing, 
shipping, dry ice) 
 
X 
 
 
 
 
 
 
 
X 
 
 
 
 
 
X 
 
X 
 
 
 
X 
CBC with Differential 
X 
 
 
 
 
 
 
X 
 
 
 
X 
X 
 
 
X 
Anti-HSV ½ IgG 
testing 
X 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Concomitant 
Medication 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
 
X 
X 
X 
X 
Collect Adverse 
Events 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
 
X 
X 
X 
X 
Squaric Acid 
Application 
X 
 
X 
 
X 
 
X 
 
X 
 
X 
 
 
X 
 
 
 

23 
 
 
Appendix D: SQX P2c Study Schema for Subject Groups A&B 
 
Groups 
A, B,  
 
 
 
A, B, 
 
 
 
A, B 
A, B 
A,B 
A, B 
A, B 
A, B 
A, B 
A, B 
End of 
Study 
(A, B) 
Schedule of 
Procedures 
Screening 
Day 0  
Week 0 
Follow-up 
3 Days 
after Wk 0 
 
Week 3  
Week 3  
Follow-up: 
3 days 
after Wk 3  
Week 6  
Week 6   
Follow-up:  
3 days 
after Wk 6 
Week 9  
Week 9 
Follow-up: 
3 days 
after Wk 9 
Month 8  
Month 8 
Follow-up:  
3 days after 
Month 8 
 
Month 9 
 
Informed Consent 
X 
 
 
 
 
 
 
 
 
 
 
Inclusion/ Exclusion 
X 
 
 
 
 
 
 
 
 
 
 
History/Demographics 
X 
 
 
 
 
 
 
 
 
 
 
Physician 
Assessments  
(Targeted Skin Exam)  
 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Urine Pregnancy Test 
X 
 
X 
 
X 
 
X 
 
X 
 
 
Vital Signs 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Photography 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
 
Diary Distribution/ 
Instruction 
X 
 
 
 
 
 
 
 
 
 
 
Instruction for taking 
Self-photographs 
X 
 
 
 
 
 
 
 
 
 
 
Collect Photographs  
 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Collect Diary 
 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Blood Collection  
(Processing, storing, 
shipping, dry ice) 
 
X 
 
 
 
 
 
 
 
X 
 
 
 
X 
CBC with Differential 
X 
 
 
 
 
 
 
X 
 
 
X 
Anti-HSV ½ IgG 
testing 
X 
 
 
 
 
 
 
 
 
 
 
Concomitant 
Medication 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Collect Adverse 
Events 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
X 
Squaric Acid 
Application 
X 
 
X 
 
X 
 
X 
 
X 
 
 

24 
 
 
Appendix E: SQX P2c Study Schema for Subject Group C 
 
Group 
C, 
 
 
C,  
 
C 
C 
C  
C  
End of Study  
Group C 
Schedule of 
Procedures 
Screening 
Day 0  
Week 0 
Follow-up 
3 Days 
after Wk 0 
 
Month 3  
Month 3 
Follow-up:  
3 days 
after 
Month 9 
Month 6  
Month 6 
Follow-up:  
3 days 
after Month 
6 
 
Month 7  
 
Informed Consent 
X 
 
 
 
 
 
 
Inclusion/ Exclusion 
X 
 
 
 
 
 
 
History/Demographics 
X 
 
 
 
 
 
 
Physician 
Assessments  
(Targeted Skin Exam)  
 
X 
X 
X 
X 
X 
X 
X 
Urine Pregnancy Test 
X 
 
X 
 
X 
 
 
Vital Signs 
X 
X 
X 
X 
X 
X 
X 
Photography 
X 
X 
X 
X 
X 
X 
X 
Diary Distribution/ 
Instruction 
X 
 
 
 
 
 
 
Instruction for taking 
Self-photographs 
X 
 
 
 
 
 
 
Collect Photographs  
 
X 
X 
X 
X 
X 
X 
Collect Diary 
 
X 
X 
X 
X 
X 
X 
Blood Collection  
(Processing, storing, 
shipping, dry ice) 
 
X 
 
 
 
 
 
 
X 
 
X 
CBC with Differential 
X 
 
 
 
 
X 
X 
Anti-HSV ½ IgG 
testing 
X 
 
 
 
 
 
 
Concomitant 
Medication 
X 
X 
X 
X 
X 
 
X 
Collect Adverse 
Events 
X 
X 
X 
X 
X 
 
X 
Squaric Acid 
Application 
X 
 
X 
 
X 
 
 

25 
 
Appendix F: Study Schema for Subject Group D 
 
Group 
D 
 
 
D 
 
 
D 
D 
End of  
Study  
Group D 
Schedule of 
Procedures 
Screening 
Day 0  
Week 0 
Follow-up 
3 Days 
after Wk 0 
 
Month 6  
Month 6 
Follow-up:  
3 days 
after Month 
6 
 
Month 7  
 
Informed Consent 
X 
 
 
 
 
Inclusion/ Exclusion 
X 
 
 
 
 
History/Demographics 
X 
 
 
 
 
Physician 
Assessments  
(Targeted Skin Exam)  
 
X 
X 
X 
X 
X 
Urine Pregnancy Test 
X 
 
X 
 
 
Vital Signs 
X 
X 
X 
X 
X 
Photography 
X 
X 
X 
X 
X 
Diary Distribution/ 
Instruction 
X 
 
 
 
 
Instruction for taking 
Self-photographs 
X 
 
 
 
 
Collect Photographs  
 
X 
X 
X 
X 
Collect Diary 
 
X 
X 
X 
X 
Blood Collection  
(Processing, storing, 
shipping, dry ice) 
 
X 
 
 
 
 
X 
 
X 
CBC with Differential 
X 
 
 
X 
X 
Anti-HSV ½ IgG 
testing 
X 
 
 
 
 
Concomitant 
Medication 
X 
X 
X 
 
X 
Collect Adverse 
Events 
X 
X 
X 
 
X 
Squaric Acid 
Application 
X 
 
X