Where To Buy Careprost? Careprost is a brand name for a medication that contains the active ingredient bimatoprost. It is primarily used to treat hypotrichosis, a condition characterized by inadequate or insufficient eyelash growth. When applied to the base of the upper eyelashes, Careprost (bimatoprost) helps to promote the growth of longer, thicker, and darker eyelashes. It works by extending the growth phase of the eyelash hair cycle and increasing the number of hairs that grow.