LATISSE® is an FDA-approved treatment to grow eyelashes for people with inadequate or not enough lashes. Great eyelashes don’t just happen overnight. That’s why it’s important to note that LATISSE® solution works gradually and remarkably — with full results at week 16. Once you begin, you must continue applying the topical solution each night and follow the directions for best results. If you stop using LATISSE® at any time, your eyelashes will return to their previous appearance over several weeks to months.