
NEW YORK-A topical sustained-release fluorouracil product for actinic keratosis that is applied once a day is now available from Dermik Laboratories (Beryn, Penn). The concentration of active ingredient in the new product, Carac, is 0.5%, or one tenth that in most fluorouracil creams. In clinical trials, use of the preparation cleared more than 70% of actinic keratoses within 1 week.