Latisse (bimatoprost) Latisse (bimatoprost) is an effective way to increase the length and fullness of your eyelashes. It is applied at the base of the eyelashes and you start noticing thicker eyelashes after 1-2 months of use. They only last while you're using the product. If you stop the product they will go back to normal after 2 months of nonuse. They increase the thickness of eyelashes by about 40%.