The US Food and Drug Administration (FDA) has approved the oral Janus kinase (JAK) inhibitor deuruxolitinib for the treatment of adults with severe alopecia areata.
The development, which was announced in a July 25, 2024, news release from the drug's manufacturer Sun Pharma, is based on data from two pivotal randomized, double-blind, placebo-controlled phase 3 clinical trials: THRIVE-AA1 and THRIVE-AA2, which included 1220 adults with severe alopecia areata enrolled at sites in the United States, Canada, and Europe. Study participants had at least 50% scalp hair loss as measured by Severity of Alopecia Tool (SALT) for more than 6 months. Data were also collected from two open-label, long-term extension trials in which patients were eligible to enroll upon completion of the 24-week trials.
Deuruxolitinib, which comes in 8-mg tablets, is an oral selective inhibitor of JAK1 and JAK2 and is administered twice a day. According to the company press release, the average patient enrolled in the clinical trials had only 13% of their scalp hair coverage at baseline. At week 24, more than 30% of patients taking deuruxolitinib experiencing 80% or more scalp hair coverage (SALT score ≤ 20). Also, up to 25% of patients had almost all of their scalp hair back at 24 weeks (≥ 90% coverage).
In terms of safety, the data showed that 3.1% of patients who received deuruxolitinib 8 mg twice daily in the phase 2 dose-ranging study and phase 3 randomized placebo-controlled trials discontinued treatment owing to adverse reactions. The three most common adverse events in placebo-controlled trials were headache (12.4% vs 9.4% with placebo), acne (10% vs 4.3% with placebo), and nasopharyngitis (8.1% vs 6.7% with placebo). More than 100 people continued taking deuruxolitinib for more than 3 years.
Deuruxolitinib is the third treatment and third JAK inhibitor approved by the FDA for severe alopecia areata. Baricitinib (Olumiant) was approved in June 2022 for adults with alopecia areata, followed by ritlecitinib (Litfulo) approved in June 2023 for patients ages 12 years of age and older.
In a statement from the National Alopecia Areata Foundation (NAAF), Nicole Friedland, NAAF's president and CEO, said that "it is with tremendous excitement that we welcome the FDA's approval of a third treatment for severe alopecia areata in as many years."