The US Food and Drug Administration today approved a drug made by Eli Lilly to treat severe alopecia areata. The agency granted approval to Olumiant, oral tablets used to treat patients with the disorder that often produces patchy baldness and affects more than 300,000 people in the US each year, the FDA said. Olumiant is a Janus kinase, or JAK, inhibitor, which blocks the immune system from attacking hair follicles. In a pair of trials, 17%-22% of patients who received 2 milligrams of Olumia...