Roflumilast Cream 0.3% in Patients With Chronic Plaque Psoriasis: Individual Patient PASI and PASI-HD Responses: Pooled DERMIS-1 and DERMIS-2 Phase 3 Trials

Background: Roflumilast cream 0.3% is a highly potent phosphodiesterase 4 inhibitor approved as a nonsteroidal, once-daily treatment for patients with plaque psoriasis. Pooled efficacy and safety results from two Phase 3 clinical trials (DERMIS-1 and DERMIS-2) have been presented previously. The Psoriasis Area and Severity Index (PASI) is used to assess the severity of plaque psoriasis in clinical trials; however, PASI is not precise when the area of involvement is <10% of a given anatomic region. A modified version of the PASI, the PASI-high discrimination (PASI-HD), allows more precise assessment of psoriasis in body regions where <10% area is affected. We present individual patient responses using PASI and PASI-HD. Methods: Patients aged ≥2 years with at least mild plaque psoriasis involving 2-20% body surface area were randomized 2:1 to apply roflumilast cream 0.3% or vehicle cream once daily for 8 weeks. The primary efficacy endpoint was Investigator Global Assessment (IGA) Success (score of Clear or Almost Clear plus ≥2-grade improvement from baseline) at Week 8. PASI and PASI-HD were used to measure disease severity; individual patient PASI and PASI-HD responses were plotted graphically. Safety and tolerability were also evaluated and were reported previously. Results: Roflumilast- and vehicle-treated patients had similar baseline demographic and disease characteristics. At Week 8, statistically significantly more roflumilast- than vehicle-treated patients achieved IGA Success (39.9% vs. 6.5%; P<0.0001). Statistically significant differences favoring roflumilast were observed at Week 8 for percentages of patients achieving a 50% reduction in PASI (72.1% vs. 25.5%; P<0.0001), 75% reduction (40.3% vs. 6.5%, P<0.0001), 90% reduction (19.7% vs 2.3%; P<0.0001), and 100% reduction (12.3% vs 0.8%; P<0.001). Likewise, statistically significant differences favoring roflumilast were observed at Week 8 for percentages of patients achieving 50% reduction in PASI-HD (79.4% vs. 33.1%; P<0.0001), 75% reduction (59.9% vs. 17.9%, P<0.0001), 90% reduction (39.9% vs 9.1%; P<0.0001), and 100% reduction (12.3% vs 0.8%; P<0.0001). Roflumilast cream demonstrated low rates of application-site adverse events (AEs), treatment-related AEs, and discontinuations due to AEs, comparable to vehicle. At the first application of roflumilast cream 0.3% (day 1), 96% of patients reported no or mild sensation, increasing to 99% of patients at Weeks 4 and 8. Conclusions: Roflumilast cream 0.3% provided greater improvement in IGA Success, PASI, and PASI-HD versus vehicle with favorable safety and tolerability in patients with psoriasis in two Phase 3 trials. PASI-HD provided higher discrimination of effects of treatment in areas with <10% involvement than the traditional PASI. ClinicalTrials.gov Identifiers: DERMIS-1: NCT04211363; DERMIS-2: NCT04211389 Financial Disclosures: Arcutis Biotherapeutics, Inc.

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