Isotretinoin cream is a retinoic acid cream that is known to be effective in the treatment of acne vulgaris, flat warts, and mucous membrane leukoplakia. It is used to inhibit the growth of acne or to eliminate acne. 1.Efficacy: This medication can be used for removing acne, pimples as well as treating the effects of flat warts, furuncle, and keratosis pilaris. It can also be used as an adjunctive treatment for psoriasis. 2. Action: Vitamin A inhibits acne production, removes keratin plugs by regulating the abnormal process of epithelial keratinization in the sebaceous glands of the hair follicles, thus playing a role in eliminating acne lesions. Adverse effects such as local burning sensation, erythema and flaking may occur after administration. Caution should be exercised in pediatric patients. It should not be used in patients with eczema, sunburn and rosacea. This drug should not be combined with soap and detergents at the same time, as it tends to cause skin dryness. Allergic to this drug or the components of the formula, it is forbidden for women in the first 3 months of pregnancy, for breastfeeding, the use of this drug is prohibited in the eyes. The specific dosage and usage of the above medicines should follow the doctor’s instructions, and should not be used on their own to avoid adverse reactions.