Derexin is haloperidol melittin tablets, half a capsule a day to stop the drug can be taken every other day, and then the frequency of the drug is reduced step by step, it is recommended to stop the drug under the supervision of a doctor. The drug reduction is mainly in the drug dose and the frequency of drug use. 1. Dosage: under normal circumstances, adults take one tablet in the morning and one tablet at noon, up to four tablets per day, half a tablet per day means that the patient is reducing the drug or the symptoms are not serious, and has reached the minimum dose, so there is no need to reduce the dose. 2. Frequency of use: patients taking half a tablet a day can take half a tablet every other day to slowly reduce the drug, and then can be taken three times a week or twice a week, it is recommended to reduce the drug under the guidance of a doctor. This product should be used in accordance with medical advice.