The number of times Aldara is applied and the duration of treatment depend on the condition being treated: • For genital warts, Aldara is applied three times a week for up to 16 weeks. • For small basal cell carcinomas, the cream is applied five times a week for six weeks. • For actinic keratoses, it is applied three times a week, for one or two four-week courses, with four weeks between courses.