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Clinical Trials in the EU / 2025-522705-37-00
Terminated Phase II

B7981119 A Phase 2, Multicenter, Randomized, Double-Blind, Placebo-Controlled, 16-Week Study Evaluating the Safety and Efficacy of Ritlecitinib (PF-06651600) in Adults with Moderate to Severe Hidradenitis Suppurativa

2025-522705-37-00 · tracked via the Priya Life Science EU tracker
Sponsor
Pfizer Inc.
Sponsor type
Pharmaceutical company
Therapeutic area
Skin and Connective Tissue Diseases
Decision date
11/03/2026
Enrollment target
71
Sites
Germany, Poland, Spain, Greece

Condition studied

HIDRADENITIS SUPPURATIVA

Investigational medicinal product(s)

Placebo for pf-06651600-15Ritlecitinib Tosilate

Eligibility

Age group
65+ years, 18-64 years
Sex
Female, Male

Primary endpoint

HiSCR50 response at Week 16

Endpoint detail

HiSCR50 response at Weeks 1, 2, 4, 6, 8, and Week 12., HiSCR75 response at Weeks 1, 2, 4, 6, 8, 12 and Week 16., HiSCR90 response at Weeks 1, 2, 4, 6, 8, 12 and Week 16., Response based on a total abscess and nodule (AN) count of 0 or 1 at Week 16., Response based on a total AN count of 0, 1, or 2 at Week 16., Percent (%) change from baseline (CFB) in total AN count at Weeks 1, 2, 4, 6, 8, 12 and 16., Absolute score and CFB in HS-IGA at Weeks 1, 2, 4, 6, 8, 12 and 16., Response based on achieving a HS-IGA=0 or 1 at Weeks 1, 2, 4, 6, 8, 12 and 16., Participants who experience an HS flare, defined as at least a 25% increase in total AN count with a minimum increase of 2 relative to Baseline, at Weeks 4, 8, 12 and 16., CFB in Hidradenitis Suppurativa Symptom Daily Diary (HSSDD) at Weeks 1, 2, 4, 6, 8, 12 and 16., Skin pain NRS30 response, at worst and on average, respectively, at Weeks 1, 2, 4, 6, 8, 12, and 16, among participants with baseline skin pain numeric rating scale (NRS) ≥3., %CFB in skin pain NRS, at worst and on average, respectively, in participants with baseline skin pain NRS ≥3, at Weeks 1, 2, 4, 6, 8, 12, and 16., CFB in skin pain NRS, at worst and on average, respectively, at Weeks 1, 2, 4, 6, 8, 12, and 16., Skin pain NRS50 response, at worst and on average, respectively, at Weeks 1, 2, 4, 6, 8, 12, and 16, among participants with baseline skin pain NRS ≥3., Skin pain NRS70 response, at worst and on average, respectively, at Weeks 1, 2, 4, 6, 8, 12, and 16, among participants with baseline skin pain NRS ≥3., Incidence of treatment emergent adverse events (TEAEs), serious adverse events (SAEs) and adverse events (AEs) leading to discontinuation, Incidence of clinically significant laboratory abnormalities over time, Absolute score and CFB in Hidradenitis Suppurativa Quality of Life (HiSQOL) at Weeks 1, 2, 4, 6, 8, 12 and 16., Absolute score and % CFB in IHS4 at Weeks 1, 2, 4, 6, 8, 12 and 16.

Official registry record

This page summarises publicly available CTIS data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.

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