CI

At a glance

ClinicalIndex Comparison Record
Phase 2Completed· 40 enrolled
Drug / intervention
acyclovir-penciclovir cream +1 moredrug
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT06558838
NCT06558838Phase 2Completed

A Randomized, Parallel Group, Pilot Study to Assess Efficacy and Safety of Acyclovir-penciclovir Cream Versus an Active Comparator (Abreva) in the Suppression of Herpes Simplex Virus Eruptions in Subjects With a History of Herpes Labialis

University of Utah·interventional·Posted Aug 19, 2024·Updated Jan 5, 2026

In Brief

A Phase 2 clinical trial evaluating acyclovir-penciclovir cream and Abreva for Herpes Simplex Oral. Completed, enrolled 40 participants across 1 site.

Detailed Summary

This will be a randomized, efficacy assessor-blinded, parallel group, pilot study of up to 40 subjects with documented herpes labialis. Patients will be treated with the study drug, acyclovir-penciclovir cream, or the active comparator of Abreva. Potential subjects will be assessed during a screening visit that must take place no greater than 2 weeks prior to the Day 1 (Baseline) visit. During the screening period, subjects that meet all other entry criteria will undergo Ultraviolet susceptibility testing to determine the subject's individual minimal erythema dose (MED). Ultraviolet susceptibility testing takes place over two days with exposure to Ultraviolet light on specified regions on the subject's back followed by an assessment of the exposed areas 24 hours later to identify the MED. Subjects who have a measurable MED will be allowed to enroll in the study. Each subject will be randomly assigned in a 1:1 ratio to receive either acyclovir-penciclovir cream or Comparator (Abreva). Patients who express a cold sore will track the lesion with a diary card to rate their pain levels, and any unusual symptoms at Day 1, Day 3, Day 5, Day 7, and Day 10. Patients may also take photographs of the lesion throughout the study.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesUnited States
Collaborators--

Timeline

Phase 2CompletedFinished
20252026
First PostedAug 19, 2024
Enrollment StartAug 19, 2024
Primary CompletionNov 30, 2025
TodayJul 2, 2026
Enrollment to primary: 1.3 yearsPosted 1.9 years ago

Interventions

acyclovir-penciclovir creamdrug

Patients will treat their cold sore with active study drug based upon their randomization

Abrevadrug

Patients will treat their cold sore with Abreva based upon their randomization