Etretinate for keratin disorders and isotretinoin for acne and not the other way around.
D000152:Acne Vulgaris / Q000188:drug therapy; D005050:Etretinate / Q000627:therapeutic use*; D006801:Humans; D015474:Isotretinoin; D007633:Keratins / Q000378:metabolism; D010214:Papillon-Lefevre Disease / Q000188:drug therapy; D012871:Skin Diseases / Q000188:drug therapy* / Q000378:metabolism; D014212:Tretinoin / Q000627:therapeutic use*
D014212:Tretinoin; D005050:Etretinate; D007633:Keratins; D015474:Isotretinoin