You should talk with your healthcare provider prior to taking thioridazine if you have:
- An irregular heart rhythm (arrhythmia), especially long QT syndrome
- Seizures or epilepsy
- Very high or very low blood pressure
- An enlarged prostate (also known as benign prostatic hyperplasia or BPH)
- Difficulty passing urine
- Any allergies, including allergies to food, dyes, or preservatives.
Also, let your healthcare provider know if you:
- Are pregnant or thinking of becoming pregnant (see Mellaril and Pregnancy)
- Are breastfeeding (see Mellaril and Breastfeeding)
- Are about to undergo surgery
- Drink alcohol regularly (see Alcohol and Mellaril).
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.
(Click Precautions and Warnings With Thioridazine to learn more, including information on who should not take this drug.)
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).