Latisse is a FDA approved prescription treatment used to make the eyelashes longer, thicker and darker. Latisse is also used to treat certain diseases of the eye like open-angle glaucoma and ocular hypertension which occurs in many people as they grow older. It is safe to use Latisse while breastfeeding.
The active ingredient in Latisse is bimatoprost ophthalmic. It may be used to treat open angle glaucoma and ocular hypertension. The drug is unlikely to enter the milk compartment due to its low plasma levels and high protein binding. Latisse is applied directly on the lashes and therefore unlikely to be absorbed systemically. Latisse is believed to affect the growth (anagen) phase of the eyelash hair cycle in two ways: first, it increases the length of this phase; and second, it increases the number of hairs in this growth phase.
Hence, there is no confirmed research that Latisse while breastfeeding is harmful. But it is better to consult a cosmetic surgeon before using it.