Careprost eye drops is a medication primarily used to treat hypotrichosis, a condition where there are inadequate or not enough eyelashes. The active ingredient in Careprost is bimatoprost, which is a prostaglandin analog. When used as prescribed for its intended purpose, which is to promote the growth of eyelashes, Careprost eye drops are generally considered safe for most people. However, like any medication, Careprost may cause side effects in some individuals.