Haloperidol is an antidopamine, anticholinergic receptor, and alpha receptor blocker, and its pharmacological effects indicate that extrapyramidal reactions are more severe and common. Haloperidol adverse reactions are as follows: 1, acute dystonia, easy to occur in children and adolescents, there will be obvious twisting spasms or even swallowing difficulties or sitting still; 2, delayed dyskinesia, such as bradykinesia, rigidity, tremor symptoms, should be a long-term use of a large number of delayed dyskinesia; 3, can appear dry mouth, blurred vision, weakness, constipation, sweating; 4, menstrual disorders The drug can cause menstrual disorders, amenorrhea, breast overflow, and even gynecomastia in men due to increased plasma lactogen concentration; 5. Depressive reactions can occur with long-term heavy use; 6. Cardiac arrhythmias, as the drug can cause prolonged QT interval and prolonged QT interval similar to arrhythmias; 7. Upright hypotension occurs. If you take haloperidol at the same time because the drug can act on the alpha receptor, so the action should be slow when taking the drug.