Latisse is a prescription medication that helps eyelashes grow longer, fuller, and darker.  It is applied at night to the skin of the upper eyelid at the base of the eyelashes by using applicators that come with the product.  It should be applied after the facial area is cleaned and makeup and contact lenses are removed.  If the medication is stopped, eyelash fullness will likely go back to the level before treatment, so for optimum results, the medication should be continued providing there are no adverse reactions.   Pigmentation of the iris, itching, irritation, lower intraocular pressure, and hair growth in other areas latisse comes into contact with are possible side effects.