in a double-blind controlled multicenter trial consisting of 257 patients with acne vulgaris an 8-week topical treatment with the retinoic acid derivative ro 11-1430 ( 0.1 % lotion ) was compared with vitamin a acid ( 0.05 % lotion ) and the lotion alone ( placebo ) .
C0001144
acne vulgaris
C0040845
vitamin a acid