Prochlorperazine (Compazine) is a medication that belongs to a class of drugs known as phenothiazines. It works by changing the actions of chemicals in your brain.This medication controls severe nausea and vomiting and also treats schizophrenia. However, prochlorperazine may also be used for treating other conditions as determined by the doctor.Prochlorperazine Maleate is an anti-psychotic drug used for treating psychotic disorders. It is mostly used as a treatment for schizophrenia which is one of the main psychotic disorders. It is categorized in the group of phenothiazine. Most of the psychotic disorders are a result of chemical imbalance in the brain. Prochlorperazine Maleate works by changing the action of the brain chemical that is responsible for causing these psychotic disorders. It can also be used to treat anxiety and in controlling severe vomiting and nausea. However, this drug should not be used on patients that have been diagnosed with dementia-related conditions. It should also not be consumed with alcohol, sedatives, or narcotics.