Displaying 6 results of Chlorpromazine Impurities Chlorpromazine is an antipsychotic drug used to treat schizophrenia and other mental illnesses. However, the drug may contain impurities that can affect its efficacy and safety. These impurities include degradation products, residual solvents, and other organic or inorganic substances. Quality control measures are necessary to ensure the purity and potency of chlorpromazine and its formulations.