1. A class of antipsychotic drugs used to treat schizophrenia, bipolar disorder, and severe nausea; characterized by a three-ring chemical structure containing sulfur and nitrogen.
Usage: medical/pharmaceutical; typically used in plural form; first-generation antipsychotics

Examples

• Phenothiazines were among the first effective medications for treating psychotic symptoms.
• The doctor prescribed phenothiazines to help manage the patient's severe hallucinations.
• Chlorpromazine is one of the most well-known phenothiazines in clinical use.
• Phenothiazines can cause side effects such as drowsiness and movement disorders.
• Modern psychiatry often uses newer antipsychotics, but phenothiazines remain important treatment options.
• The discovery of phenothiazines revolutionized the treatment of mental illness in the mid-20th century.