671 - Rapid and early onset of itch relief with tapinarof cream 1% once daily in two pivotal phase 3 trials in adults and children down to two years of age with atopic dermatitis

Abstract Introduction Itch is the most bothersome symptom for patients with atopic dermatitis (AD), and has a significant negative impact on health-related quality of life. Rapid onset of pruritus relief with sustained efficacy is a key outcome for AD therapies. In ADORING 1 and 2, two identical pivotal phase 3, double-blind, vehicle-controlled trials, tapinarof cream 1% once daily (QD) demonstrated efficacy and was well tolerated in adults and children down to 2 years of age with AD. Objective Here, we evaluate time to onset of itch relief in the pivotal phase 3 trials. Methods In ADORING 1 and 2, patients with a Validated Investigator Global Assessment for Atopic DermatitisTM score of ≥3 (moderate or severe), an Eczema Area and Severity Index score of ≥6, and body surface area involvement of 5–35% were randomized 2:1 to tapinarof cream or vehicle QD for 8 weeks. Itch relief was assessed by changes in Peak Pruritus Numerical Rating Scale (PP-NRS) score, daily and by visit, from baseline through Week 8. PP-NRS considers itch over the past 24 hours; lower scores indicate less pruritus. Results 407 and 406 patients were randomized in ADORING 1 and 2. At baseline, mean PP-NRS scores were 6.7 and 6.8 in both trials, respectively. For daily evaluations of itch from baseline, greater reductions in mean PP-NRS scores for tapinarof versus vehicle were observed as early as Day 1, 24 hours after initial application in ADORING 1 (–1.2 vs –0.9), and Day 2 in ADORING 2 (–1.6 vs –1.4). Daily itch improvements continued through Week 8 in both trials. Statistically significant reductions in mean weekly PP-NRS scores occurred as early as Week 1 (earliest assessment) with tapinarof versus vehicle (–2.0 vs –1.2 [P<0.0001]) and (–2.0 vs –1.3 [P=0.0010]) in ADORING 1 and 2, respectively. Significantly greater reductions in mean PP-NRS scores with tapinarof versus vehicle were seen for all visits through Week 8 (–4.1 vs –2.6 and –4.1 vs –2.4 [both P<0.0001]). Conclusions Tapinarof cream 1% QD demonstrated rapid, significant, and clinically meaningful pruritus relief from 24 hours after initial application, with improvements increasing through Week 8 in both trials in adults and children down to 2 years with AD.