Safety, Pharmacokinetics and Efficacy of PP405 in Adults With AGA

September 29, 2026 updated by: Pelage Pharmaceuticals, Inc.

A Randomized, Multicenter, Double-blind, Vehicle-controlled, Phase 2a Study to Assess the Safety, Pharmacokinetics, and Efficacy of PP405 in Adults With Androgenetic Alopecia

The study is a two part study, designed to validate safety results from the Phase 1 PP405-001 trial while also characterizing longer term safety and PK. Part 1 of the trial is the randomized controlled portion that will focus on safety and PK following 28 days of blinded treatment administration with either PP405 or vehicle control. Part 2 of the trial is an open-label extension that will validate the results of Part 1 with 3 months of treatment administration.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

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

Safety, Pharmacokinetics, and Efficacy Study of PP405 in subjects with Androgenetic Alopecia.

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 (Actual)

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.
78

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.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Encinitas, California, United States, 92024
        • California Dermatology & Clinical Research Institute
      • Thousand Oaks, California, United States, 91320
        • Clinical Trials Research Institute
    • Indiana
      • Indianapolis, Indiana, United States, 46250
        • Dawes Fretzin Clinical Research Group, LLC
    • Minnesota
      • New Brighton, Minnesota, United States, 55112
        • Minnesota Clinical Study Center
    • Texas
      • Austin, Texas, United States, 78759
        • DermResearch
      • Sugar Land, Texas, United States, 77479
        • Stride Clinical Research LLC
    • Utah
      • South Jordan, Utah, United States, 84095
        • Jordan Valley Dermatology Center
    • Virginia
      • Norfolk, Virginia, United States, 23502
        • Virginia Clinical Research, Inc.

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

18 years to 55 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Male or female subjects aged 18 to 55 years.
  2. Able and willing to provide written informed consent.
  3. Males must have an AGA modified Norwood-Hamilton Classification score of Type III vertex, Type IV or Type V. Females must have a Savin classification score of I-2, I-3 or I-4.
  4. Agree to comply with protocol procedures

Exclusion Criteria:

  1. Concomitant diagnosis of non-AGA forms of alopecia.
  2. Use of other hair loss treatments within periods specified in protocol.
  3. Use of excluded medications as specified in protocol.
  4. Diagnosis of other medical conditions as specified in protocol.
  5. Any disease or medical condition that, in the opinion of the Investigator, would prevent the subject from participating in the study or might confound study results.

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: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Quadruple

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.
Active Comparator: PP405 0.05% Topical Gel

PP405 0.05% Topical Gel applied once daily for 28 days.
Drug: PP405 0.05% Topical Gel

Medicated topical gel containing PP405 0.05%, applied once daily to the scalp

Other Names:
  • PP405 0.05%
Placebo Comparator: Topical Vehicle Gel, then PP405 0.05% Topical Gel

Topical Placebo Gel applied once daily for 28 days. Following the initial treatment and follow-up period through day 84, eligible subjects crossed over to apply PP405 0.05% topical gel for 84 days in an open-labeled extension.
Drug: PP405 0.05% Topical Gel

Medicated topical gel containing PP405 0.05%, applied once daily to the scalp

Other Names:
  • PP405 0.05%
Drug: Topical Vehicle Gel

Vehicle = placebo topical gel

Other Names:
  • Topical Placebo

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
Percentage of Subjects With Adverse Events
Time Frame: Baseline to Day 84 of the randomized portion of the study

An adverse event that was not present when the active phase of the study began and was not a chronic condition that was part of the subject's medical history; or, it was present at the start of the active phase of the study or as part of the subject's medical history, but the severity or frequency increased during the active phase
Baseline to Day 84 of the randomized portion of the study
Percentage of Subjects With Adverse Events
Time Frame: Baseline to Day 84 of the open label extension portion of the study

An adverse event that was not present when the active phase of the study began and was not a chronic condition that was part of the subject's medical history; or, it was present at the start of the active phase of the study or as part of the subject's medical history, but the severity or frequency increased during the active phase
Baseline to Day 84 of the open label extension portion of the study
Change in Local Dermal Tolerability as Assessed by Subject and Investigator
Time Frame: Post-dose at day 28 of the randomized portion of the study

Local skin reaction treatment emergent adverse events such as burning, pruritis, erythema
Post-dose at day 28 of the randomized portion of the study
Change in Local Dermal Tolerability as Assessed by Subject and Investigator
Time Frame: Post-dose at day 84 of the open label extension portion of the study

Local skin reaction treatment emergent adverse events such as burning, pruritis, erythema
Post-dose at day 84 of the open label extension portion of the study
Change From Baseline in Blood Pressure
Time Frame: Baseline to Day 84 of the randomized portion of the study

Change from baseline in blood pressure in the safety analysis population (day 84 minus baseline)
Baseline to Day 84 of the randomized portion of the study
Change From Baseline in Pulse Rate
Time Frame: Baseline to Day 84 of the randomized portion of the study

Change from baseline in pulse rate in the safety analysis population (day 84 minus baseline)
Baseline to Day 84 of the randomized portion of the study
Change From Baseline in Temperature
Time Frame: Baseline to Day 84 of the randomized portion of the study

Change from baseline in temperature in the safety analysis population (day 84 minus baseline)
Baseline to Day 84 of the randomized portion of the study
Change From Baseline in Respiratory Rate
Time Frame: Baseline to Day 84 of the randomized portion of the study

Change from baseline in respiratory rate in the safety analysis population (day 84 minus baseline)
Baseline to Day 84 of the randomized portion of the study
Change From Baseline in Weight
Time Frame: Baseline to Day 84 of the randomized portion of the study

Change from baseline in weight in the safety analysis population (day 84 minus baseline)
Baseline to Day 84 of the randomized portion of the study
Change From Baseline in Blood Pressure
Time Frame: Baseline to Day 84 of the open label extension portion of the study

Change from baseline in blood pressure in the safety analysis population (open label extension day 84 minus open label extension baseline)
Baseline to Day 84 of the open label extension portion of the study
Change From Baseline in Pulse Rate
Time Frame: Baseline to Day 84 of the open label extension portion of the study

Change from baseline in pulse rate in the safety analysis population (open label extension day 84 minus open label extension baseline)
Baseline to Day 84 of the open label extension portion of the study
Change From Baseline in Temperature
Time Frame: Baseline to Day 84 of the open label extension portion of the study

Change from baseline in temperature in the safety analysis population (open label extension day 84 minus open label extension baseline)
Baseline to Day 84 of the open label extension portion of the study
Change From Baseline in Respiratory Rate
Time Frame: Baseline to Day 84 of the open label extension portion of the study

Change from baseline in respiratory rate in the safety analysis population (open label extension day 84 minus open label extension baseline)
Baseline to Day 84 of the open label extension portion of the study
Change From Baseline in Weight
Time Frame: Baseline to Day 84 of the open label extension portion of the study

Change from baseline in weight in the safety analysis population (open label extension day 84 minus open label extension baseline)
Baseline to Day 84 of the open label extension portion of the study
Change From Baseline in Mean Electrocardiogram Heart Rate
Time Frame: Baseline to day 28 of the randomized portion of the study

Electrocardiogram mean heart rate was compared to baseline (day 28 minus baseline)
Baseline to day 28 of the randomized portion of the study
Change From Baseline in Electrocardiogram (ECG) Results
Time Frame: Baseline to day 28 of the randomized portion of the study

Electrocardiograms results were compared to baseline (day 28 minus baseline)
Baseline to day 28 of the randomized portion of the study
Change From Baseline in Mean Electrocardiogram Heart Rate
Time Frame: Baseline to day 84 of the open label extension portion of the study

Mean Electrocardiogram Heart Rate was compared to baseline of the open label extension study (day 84 minus baseline)
Baseline to day 84 of the open label extension portion of the study
Change From Baseline in Electrocardiograms (ECGs)
Time Frame: Baseline to day 84 of the open label extension portion of the study

Electrocardiograms results were compared to baseline of the open label extension study (day 84 minus baseline)
Baseline to day 84 of the open label extension portion of the study
Abnormal Laboratory Values
Time Frame: Day 28 post baseline in the randomized portion of the study

Chemistry and hematology laboratory values were recorded as normal or abnormal (low or high)
Day 28 post baseline in the randomized portion of the study
Abnormal Laboratory Values
Time Frame: Day 84 post baseline in the open label extension portion of the study

Chemistry and hematology laboratory values were recorded as normal or abnormal (low or high)
Day 84 post baseline in the open label extension portion of the study

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
Pharmacokinetics of PP405
Time Frame: Baseline to Day 28 of the randomized portion of the study, assessed at 2 hours (±10 minutes) post-dose on day 1, day 14, and day 28

To assess the concentration of PP405 in plasma
Baseline to Day 28 of the randomized portion of the study, assessed at 2 hours (±10 minutes) post-dose on day 1, day 14, and day 28
Pharmacokinetics of PP405
Time Frame: Baseline to Day 84 of the open label extension portion of the study, assessed at 2 hours (±10 minutes) post-dose on day 1, day 28, day 56, and day 84

To assess the concentration of PP405 in plasma
Baseline to Day 84 of the open label extension portion of the study, assessed at 2 hours (±10 minutes) post-dose on day 1, day 28, day 56, and day 84

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.
Pelage Pharmaceuticals, Inc.

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.
  • Study Chair: Christina Weng, Pelage Pharmaceuticals

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 (Actual)

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 5, 2024

Primary Completion (Actual)

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.
July 16, 2025

Study Completion (Actual)

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.
October 1, 2025

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).
April 26, 2024

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.
April 26, 2024

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.
May 1, 2024

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.
October 21, 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.
September 29, 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.
September 1, 2026

More Information

Terms related to this study

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.
  • PP405-2001

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

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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