For the vast majority of our patients, Latisse has been an amazing success for attaining longer, darker, thicker lashes. Eyelashes grow in a cycle, over several months. Latisse is believed to increase the percentage of hairs in the active growth phase, as well as make the active growth phase longer Application of Latisse is easy and done only once a day to the upper eyelid/lash margin. Irritation is rare. Results can be seen as early as 4 weeks, but are maximal at 16 weeks. One bottle lasts approximately 2 months – 3 months.