What is this drug used for? October 17, 2019 01:32 It is used to help eyelashes grow. It may take 2 months to see the full effect. It is used to treat glaucoma. It is used to lower high eye pressure. Related articles What do I need to tell my doctor BEFORE I take this drug? What are some side effects that I need to call my doctor about right away? How is this drug best taken? What are some things I need to know or do while I take this drug? What do I do if I miss a dose of Latisse?