Wanting fuller lashes? Do you notice your lashes thinning over time? Latisse can be your solution to help grow your lashes thicker, longer, and darker. Latisse is an FDA-approved treatment used to stimulate the growth of eyelashes. Simply apply a small amount to the base of the upper eyelashes typically once per day and begin to see results within four to eight weeks, with the most dramatic results appearing by weeks 12 and 16.