Allergan, the health care company that manufactures Latisse, is currently testing the safety and efficacy in growing hair on the scalp, but is the eyelash enhancer really safe? The appeal of using Latisse for hair loss is it only requires one drop to the affected area once a day; minoxidil (Rogain) requires two, and Propecia requires two pills daily. Dr Ariel Ostad, MD at the Department of Dermatology at New York University Medical Center discusses the side effects, any misleading claims and effectiveness for your eyelashes, eyebrows and hair.