You should also make sure to tell your healthcare provider about all other medicines you are taking, including prescription and nonprescription medicines, vitamins, and herbal supplements.
Thioridazine belongs to a group of medications called typical (or first-generation) antipsychotic medications. In particular, it is part of a group of medications called phenothiazines. It is not entirely known exactly how thioridazine works. However, it is known to block or lessen the effects of dopamine, a chemical in the brain that may be elevated in people with schizophrenia.
This medication is not a cure for schizophrenia, however. It only helps to control symptoms (see Symptoms of Schizophrenia).