Topical Minocycline for CARP

March 5, 2026 updated by: Lara Wine Lee, Medical University of South Carolina

Topical Minocycline Foam for Treatment of Confluent and Reticulated Papillomatosis (CARP)

This proof-of-concept trial evaluates the efficacy, safety, and patient satisfaction of topical minocycline foam (AMZEEQ®) in patients aged 9 and older with confluent and reticulated papillomatosis (CARP). Participants will apply AMZEEQ® to one side of the body and a topical emollient to the other for 5 weeks, followed by an optional extension period. The study aims to assess whether topical minocycline is a well-tolerated and effective alternative to oral antibiotics.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Confluent and reticulated papillomatosis (CARP) is a dermatologic condition consisting of primarily truncal hyperpigmented and hyperkeratotic papules and macules in adolescents. The exact cause is unclear, though a gram-positive actinomycete, Dietzia papillomatosis, likely plays a role. Resolution of the rash could take a year or even years to fully occur. While the gold-standard is to treat with oral minocycline (100 mg daily), preliminary data suggests that topical minocycline may be effective as well. A case report of a 51-year-old female documents clearance with topical minocycline foam. Other antibiotics can be considered as well, such as azithromycin and erythromycin. Antifungal medications can also be considered as well as topicals such as tretinoin, tacrolimus, and urea.

Oral minocycline has a number of side effects and cannot be used in pregnancy. Given side effects and risks of lengthy oral antibiotic treatment, investigators believe that utilization of topical minocycline foam could be a suitable option for patients, especially those who do not want to be treated with oral minocycline for an extended period of time.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
35

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Early Phase 1

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Age ≥ 9 years
  • Clinical diagnosis of CARP

Exclusion Criteria:

  • Current or recent (within 6 months) use of oral minocycline
  • Pregnancy or breastfeeding
  • History of intracranial hypertension, autoimmune disorder, liver/kidney disease
  • Immunocompromised status
  • Hypersensitivity to tetracyclines
  • Unstable medical condition
  • Inability or unwillingness to provide informed consent

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Experimental Half of the Body
Participants will apply the investigational topical medication to one half of the body that they choose
Drug: Topical Minocycline Foam FXFM244
Topical minocycline foam that will be applied to half of the subject's body that will be chosen by the subject.
Placebo Comparator: Control Half of the Body
Participants apply the control topical emollient without active ingredient to the contralateral half of the body
Other: Control
Control topical emollient that will be applied to the contralateral half of the body.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change in analog score based on blinded reviewer analysis of individuals treated with both daily topical AMZEEQ® (minocycline) compared to topical emollient
Time Frame: 5 +/- 1 weeks
Comparison between the efficacy of topical minocycline foam and the control emollient. This will be completed by a dermatologist or dermatology resident that will be blinded to which side was treated with which intervention. Assessment will be completed through a visual analog used by the assessor where REDCap will assign a numeric value based on the position of the marking. The blinded photo reviewer will be informed whether the photo is a baseline or follow-up photo, but will be blinded to which side of the body was treatment or control. The photos will be marked to indicate the side of the body, and the photo reviewer will be asked to compare the left baseline side to the left follow-up side, and similarly the right baseline to the right follow-up, using a visual sliding analogue scale, where REDCap will assign a numeric value based on the position of the marking indicator. Average response to treatment among all patients will be determined.
5 +/- 1 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Assess possible adverse effects secondary to topical minocycline (AMZEEQ) use
Time Frame: 6 +/- 1 weeks
Prior to beginning treatment, subjects will fill out a survey including the following conditions: headache, erythema, dry skin, hyperpigmentation, skin peeling, itching, GI upset, bone or muscle pain, photosensitivity, serious skin hypersensitivity reactions, delayed wound healing, nail changes, or infection. After completing the course of topical minocycline foam, patients will complete a follow up form again through REDCap which will be compared to the form completed at baseline.
6 +/- 1 weeks
Discern patient satisfaction with daily topical minocycline (AMZEEQ) use compared to daily topical emollient
Time Frame: 6 +/- 1 weeks
To determine patient satisfaction, the Children's Dermatology Life Quality Index (CDLQI) survey for ages 4-16 or Dermatology Life Quality Index (DLQI) survey for ages 16+ will be administered at baseline before receiving the study drug and at each 6-week ± 5 day follow-up visit via REDCap. The CDLQI and DLQI surveys are the most frequently used validated, patient-reported outcome measure in dermatology trials. The DLQI is a 10-question, self-administered survey for patients over 16, designed to measure how skin conditions impact daily life over the past week. It covers symptoms, daily activities, leisure, work/school, personal relationships, and treatment, with a total score of 0-30 where higher scores indicate greater impairment. The CDLQI contains many of the same questions as the DLQI, but is administered to patients from the ages of 4 to 16.
6 +/- 1 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Medical University of South Carolina

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Journey Medical Corporation

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Lara Wine Lee, MD, Medical University of South Carolina

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

  • FDA Authority Over Cosmetics: How Cosmetics Are Not FDA-Approved, but Are FDA-Regulated (https://www.fda.gov/cosmetics/cosmetics-laws-regulations/fda-authority-over-cosmetics-how-cosmetics-are-not-fda-approved-are-fda-regulated)
  • FDA drug information, AMZEEQ®TM (minocycline) topical foam (https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/212379s000lbl.pdf)
  • Lateef H, et al. Successful treatment of confluent and reticulated papillomatosis with minocycline topical 4% foam. SKIN. 2022; Vol 6. No. 1.
  • Nazarian S, Akhondi H. Minocycline. 2023 Nov 12. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. PMID: 32119406.
  • Le C, Bedocs PM. Confluent and Reticulated Papillomatosis. StatPearls [Internet]. Web. Last Updated: August 7, 2023. Accessed: July 20, 2024

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 12, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 5, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 10, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 10, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 5, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • Pro00140636

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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