Achievement of No-to-minimal Itch and Sleep Improvement with Tapinarof Cream 1% Once Daily in Two Pivotal Phase 3 Trials in Adults and Children Down to 2 Years of Age with Atopic Dermatitis

Abstract

Introduction: Itch frequently causes sleep disturbance in patients with atopic dermatitis (AD). The gold-standard Peak Pruritus Numerical Rating Scale (PP-NRS) improvement from baseline is 4 points; however, more stringent outcomes include achieving no-to-minimal itch (PP-NRS ≤1). Tapinarof cream 1% once daily (QD) demonstrated superior efficacy, including itch reduction, versus vehicle and was well tolerated in adults and children down to 2 years of age with AD in the ADORING 1 and 2 pivotal phase 3 trials. Here we present highly stringent itch outcomes and sleep improvement with tapinarof from these trials.

Methods: In ADORING 1 and 2, patients with a Validated Investigator Global Assessment for Atopic Dermatitis™ score ≥3 (moderate or severe), Eczema Area and Severity Index score ≥6, and body surface area involvement of 5–35% were randomized to tapinarof cream or vehicle QD for 8 weeks. Stringent
PP-NRS assessments were analyzed post hoc and included achieving no‑to‑minimal itch (PP-NRS ≤1) or PP-NRS score <2. Mean weekly PP-NRS scores were assessed on an 11-point scale (0 indicates “no itch” and 10 is “worst imaginable itch”). The Patient Oriented Eczema Measure (POEM) question 2 evaluated sleep disturbance on a 5-point scale (0 indicates “no days” and 4 is “every day”); outcomes were pooled and stratified by age.

Results: 407 and 406 patients were randomized in ADORING 1 and 2. Mean baseline scores were similar across ADORING 1 and 2 treatment groups: PP-NRS, 6.7 and 6.8; pooled POEM sleep disturbance scores, 2.0 (aged ≥12 years) and 2.4 (<12 years), respectively. Statistically significant achievement of no-to-minimal itch (PP-NRS ≤1), PP-NRS <2, and improvement in sleep were achieved with tapinarof versus vehicle as early as Week 1, the first assessment, and continued through Week 8. Stringent itch outcomes were achieved with tapinarof versus vehicle at Week 8: no-to-minimal itch, 31.4% versus 17.4% (P=0.0072) and 33.0% versus 14.0% (P=0.0003); and PP-NRS <2, 48.1% versus 28.4% (P=0.0006) and 46.8% versus 19.6% (P<0.0001) in ADORING 1 and 2, respectively. Sleep scores improved with tapinarof versus vehicle at Week 8: –1.4 versus –0.8 (≥12 years); –1.7 versus –1.0 (<12 years; both P<0.0001).

Conclusion: Tapinarof cream 1% QD demonstrated early, significant, and meaningful achievement of no-to-minimal itch and improvement of sleep in adults and children down to 2 years of age with AD.