A prescription medication called Careprost is used to treat hypotrichosis and promotes the growth of longer, darker, and thicker eyelashes than ever before. It is applied to the skin at the base of the eyelashes on the upper eyelid. Never try to rinse your eyes after using the product. One application every night to the skin of the upper eyelid only is the recommended dosage. After applying your makeup every night, make sure your face is clean and take off any contact lenses or cosmetics. Take the applicator and dab the applicator brush with one drop of solution. Using an applicator, draw the line at the base of the eyelashes right away.