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Isotretinoin

Phase 2

Acneiform Drug Eruption | Small molecule | Dermatology |Day One Biopharmaceuticals, Inc.|Last Updated: Jun 5, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment50
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07629167Isotretinoin vs. Doxycycline for Acneiform Rash in Patients Receiving Drugs That Target the MAPK PathwayPHASE2 NOT YET_RECRUITING 50Aug 30, 2026Mar 30, 2030Jun 5, 20261 United States
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Study Endpoints
Primary Endpoints
Proportion of Participants who experienced acneiform rash
Up to 12 weeks following treatment

The proportion of participants who experience a Grade \< 2 acneiform rash at week 12 while receiving non-investigational treatment for cancer that targets the mitogen activated protein kinase (MAPK) pathway as classified by the National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE version 5.0) and 95% confidence interval will be reported.

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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Arm A: IsotretinoinEXPERIMENTALParticipants randomized to the isotretinoin arm will be enrolled in the iPLEDGE program prior to treatment initiation. Female participants of childbearing potential will undergo a urine or serum pregnancy test as required for iPLEDGE registration. Participants will receive oral isotretinoin daily at a dose based on body weight, ranging from 10 mg to 40 mg, for up to 12 weeks. Treatment will consist of three consecutive 28-day cycles. Participants will undergo follow-up at the end of treatment and at 30 days, 3 months, and 6 months after treatment completion for safety monitoring and post-treatment assessments, until withdrawal from the study or death, whichever occurs first.
Arm B: DoxycyclineEXPERIMENTALParticipants randomized to the doxycycline arm will receive oral doxycycline daily at a body weight-based dose of 50 mg or 100 mg for up to 12 weeks. Treatment will consist of three consecutive 28-day cycles. Participants will undergo follow-up at the end of treatment and at 30 days, 3 months, and 6 months after treatment completion for safety monitoring and post-treatment assessments, until withdrawal from the study or death, whichever occurs first.
Interventions
NameTypeDescription
IsotretinoinDRUGGiven Orally
DoxycyclineDRUGGiven Orally
Blood specimen collectionPROCEDUREPerform blood draw
Photographs of RashOTHERUndergo photography
QuestionnairesBEHAVIORALParticipants will be asked to complete questionnaires
Stool Specimen collectionPROCEDUREPerform stool sample collection
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Eligibility Criteria
Age Range12 Years — 39 Years
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: 1. Participants must have developed either a grade 2, 3, or 4 rash categorized as acneiform while taking tumor-directed therapy that targets the MAPK pathway. * Acneiform rash will be defined according to CTCAE v5.0 as a disorder characterized by an eruption of papules and p...

Countries:United States
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Recent Changes (Last 90 Days)
LOWJun 5, 2026NCT07629167NEW_TRIAL: changed
LOWJun 5, 2026NCT07629167NEW_TRIAL: changed
LOWJun 5, 2026NCT07629167NEW_TRIAL: changed
LOWJun 5, 2026NCT07629167NEW_TRIAL: changed