Review of Ruxolitinib in the Treatment of Atopic Dermatitis

Objective To review the pharmacokinetics, efficacy, and safety of a newly approved topical Janus kinase 1 (JAK) inhibitor, ruxolitinib (RUX), in patients with atopic dermatitis (AD). Data Sources A literature search was completed May 1, 2022. The term RUX and AD was queried in MEDLINE (PubMed) and EMBASE databases. Study Selection and Data Extraction Peer-reviewed articles written in English and published prior to May 1, 2022 were included. Data Synthesis In the phase II clinical trial, more patients treated with 1.5% topical RUX twice a day had a mean percentage improvement in Eczema Area and Severity Index (EASI) scores from baseline to 4 weeks, when compared to vehicle (71.6% vs 15.5%; P < 0.001). In phase III clinical trials, greater percentage of patients who received 0.75% topical RUX (TRuE-AD1 50.0% and TRuE-AD2 39.0%) or 1.5% topical RUX (TRuE-AD1 53.8% and TRuE-AD2 51.3%) achieved an Investigator’s Global Assessment (IGA) score of 0 (clear) or 1 (almost clear) and had a ≥2-grade improvement from baseline to 8 weeks, when compared to vehicle (TRuE-AD1 15.1% and TRuE-AD2 7.6%; P < 0.001). Relevance to Patient Care and Clinical Practice Atopic dermatitis is a highly prevalent long-term inflammatory skin condition. Pruritus is the main contributor of decreased quality of life in patients with AD. Topical RUX inhibits JAK1 and JAK2 producing antiinflammatory and antipruritic effects. Patients experienced a reduction in pruritus within 2 days. This decreased pruritus translated to increased quality of life and less sleep disturbances. Conclusion Data from phase II and III clinical trials in adult patients suggest RUX is an effective and safe therapy for AD.