The generic name of Derexin is Haloperidol Melitrexin, which has the side effect of causing respiratory depression in patients, but the probability of occurrence is extremely low and the use of the drug needs to be under the supervision of a medical professional. Fluperthiazide Melitracine is a psychotropic drug. Clinically, it is commonly used in the treatment of patients with mild and moderate depression, patients with anxiety disorders, neurasthenia, menopausal depression, psychogenic depression and other diseases, it is generally recommended to take it in the morning when the effect is better. The common adverse reactions during the treatment of the drug are insomnia, drowsiness, dizziness, constipation, etc. Rarely can lead to respiratory depression, the need to stop the drug in time. Allergic patients are forbidden to use the drug treatment, in order to avoid allergic reactions leading to adverse consequences; pregnant women in the early stages of pregnancy, embryonic development is in a sensitive stage, the application of haloperidol melittin may lead to fetal malformations, should not be applied; combined with blood system diseases, pheochromocytoma patients applying the drug treatment can lead to the aggravation of the original condition, should not be applied. As there are many contraindications during the treatment of this drug, improper application can lead to adverse consequences, the use of this drug treatment needs to be carried out under the guidance of a professional physician.