Avitamin A capsule instruction dosage: at the beginning of treatment should be given Avitamin A capsule 25 or 30mg per day, as a separate dose with the main meal; after the beginning of effective treatment can be given 25mg to 50mg per day as a maintenance dose; keratosis pilaris maintenance dose of 10mg per day, the maximum is 50mg per day. Avicenna capsule is mainly used for the treatment of severe psoriasis, such as erythrodermic psoriasis, pustular psoriasis, etc.; adverse reactions are vitamin A excess syndrome-like reactions, mainly manifested as itching, sensory sensitization, photoallergy, labial inflammation, rhinitis, dry mouth, dry eyes, conjunctivitis, etc.; contraindicated in pregnant women and lactating mothers; contraindicated in people with severe hepatic or renal insufficiency and hyperlipidemia. During the period of medication, it is necessary to pay attention to, should avoid drinking alcoholic beverages and abstain from alcohol; regular check of liver function; is taking retinoids treatment and 2 years after stopping the drug, patients should not donate blood; do not use vitamin A-containing preparations or health food, to avoid excessive exposure to sunlight; for long-term use of Avian influenza A patients should be regularly examined for any bone abnormalities. The above content is for reference only, patients who need to use Avitamin A capsules, please use reasonable medication under the guidance of a professional doctor, remember not to blindly self-medication to avoid adverse reactions.