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Isotretinoin

Phase 2

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

Target and mechanism

Molecular targetRARG, RARB, RARA
Target classAgonist
ModalitySmall molecule
ChEMBLCHEMBL547

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLEDDMC
Total Trials1
Total Enrollment50

FDA Designations

No designations recorded

Clinical trial landscape

Isotretinoin · 1 trial · 2 indications

Phase 2 1
NCT07629167Isotretinoin vs. Doxycycline for Acneiform Rash in Patients Receiving Drugs That Target the MAPK PathwayAcneiform Drug Eruption
NOT YET_RECRUITING50 Analytics
PHASE2NOT YET_RECRUITING
Isotretinoin vs. Doxycycline for Acneiform Rash in Patients Receiving Drugs That Target the MAPK Pathway
Acneiform Drug EruptionUnlock trial analytics

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 to 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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Frequently asked questions about Isotretinoin

What is Isotretinoin used for?

Isotretinoin is being studied for the treatment of acneiform drug eruption, a skin condition that can occur in patients receiving drugs that target the MAPK pathway. It is a small molecule being developed by Day One Biopharmaceuticals for this dermatology indication.

Who makes Isotretinoin?

Isotretinoin is being developed by Day One Biopharmaceuticals, Inc., a company traded under the ticker DAWN. The company is conducting a Phase 2 clinical trial to evaluate the drug for acneiform drug eruption.

What phase is Isotretinoin in?

Isotretinoin is in Phase 2 clinical development. It is an investigational drug being studied for acneiform drug eruption and has not been approved by the FDA for this use. The ongoing trial is a controlled, randomized study.

What clinical trials is Isotretinoin in?

Isotretinoin is being evaluated in a Phase 2 clinical trial with the identifier NCT07629167. The study compares Isotretinoin to Doxycycline for acneiform rash in patients receiving drugs that target the MAPK pathway. It is a randomized, controlled trial with an enrollment of 50 participants.

How does Isotretinoin work?

Isotretinoin is a small molecule being studied for acneiform drug eruption. The specific molecular target of Isotretinoin is not disclosed in the available information, so its mechanism of action for this indication is not detailed.