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Tapinarof

Phase 2

Palmoplantar Keratoderma | Small molecule | Other |Organon & Co.|Last Updated: Mar 4, 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
UNCONTROLLEDBiomarker
Total Trials1
Total Enrollment6
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06561321Study to Evaluate the Safety and Efficacy of Tapinarof in Adults With Palmoplantar KeratodermaPHASE2 RECRUITING 6Oct 30, 2024Dec 31, 2027Mar 4, 20261 United States
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Study Endpoints
Primary Endpoints
Physician's Global Assessment (PGA)
Week 16 (Visit 4)

To evaluate the treatment benefit of Tapinarof applied topically to patients affected with palmoplantar keratoderma. Either an overall change in the PGA score to 0 (clear) or 1 (almost clear) or a decrease from baseline of at least 2 points. Higher scores indicate a worse outcome. Title: PHYSICIAN GLOBAL ASSESSMENT Minimum value: 0 Maximum value: 5

Secondary Endpoints
Treatment Emergent Adverse Event (TEAEs)
through study completion, 52 weeks
Skin assessment every visit
through study completion, 52 weeks
Skin pictures at baseline to 52 weeks
through study completion, 52 weeks
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Tapinarof Drug TreatmentEXPERIMENTALSubjects in this arm will apply Tapinarof 1% cream topically once daily for a 16-week open-label treatment period. Participants who achieve disease clearance after 16 weeks may discontinue treatment and will be monitored for sustained response up to 52 weeks. Those who do not achieve clearance will continue the treatment during an extension period for up to 36 additional weeks or until clearance is achieved, whichever comes first. Regular follow-up visits will assess the duration of disease clearance and monitor for any potential recurrence of keratoderma.
Interventions
NameTypeDescription
TapinarofDRUGDaily topical Tapinarof use will stop disease advancement and improve the quality of life in patients with palmoplantar keratoderma, through its AhR \& NRF2 agonism properties.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Ability to discern and provide written informed consent and voluntarily adhere to all of the protocol requirements * Male or female subjects in their adult years (≥ 18 years of age), inclusive, from the time of providing written subject-investigator agreement. * Confirmed clin...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06561321primaryCompletionDate: changed
LOWMay 24, 2026NCT06561321studyFirstPostDate: changed