Psychopharmacology (drug therapy) is used for which of the following purposes?

A. As a cure for mental illness Most psychiatric disorders are chronic conditions; medications manage symptoms but do not provide a cure. B. To alter the pain receptors in the brain This applies more to analgesics and pain management, not psychiatric drugs. C. To decrease symptoms and facilitate other therapies Medications help stabilize mood or behavior so the patient can benefit from psychotherapy, education, or other interventions. D. Only to control violent behavior This is too narrow. Psychopharmacology is used to treat a broad range of symptoms, not just aggression.