Tofacitinib 5 mg tablets are sometimes used to treat hair loss caused by alopecia areata. This medicine works by calming down the immune system, which mistakenly attacks hair follicles in this condition. Some people have seen good hair regrowth with it, but it is not officially approved for alopecia areata and is considered an off-label treatment. It should be taken only under a doctor’s supervision, as it can have side effects like infections or changes in blood test results.