Reistone Biopharma Co. Ltd. said both doses of the JAK1 inhibitor ivarmacitinib, tested against moderate to severe atopic dermatitis (AD) in a multinational phase III trial, met the study’s co-primary endpoints, delivering significant improvements on a common measure of disease severity vs. placebo. It’s the first National Class A new drug for AD that is designed and developed in China, according to the company.