Take this medication exactly as prescribed. During the first few days your doctor may gradually increase your dose to allow your body to adjust. Do not take this medication more often or increase your dose without consulting your doctor. Do not stop taking this drug suddenly without your doctor's approval. Your doctor will decide which dose is best for you. Trifluoperazine is usually taken twice-a-day. Patients with mild to moderate symptoms usually start with 1 or 2 mg twice-a-day. If necessary, dosage may be increased to 6 mg daily but above this amount, side effects are more likely to occur in some patients. Do not use the medication if are allergic to Trifluoperazine or any other ingredients in the medication, have a tumor of adrenal gland, have a serious heart disease or blood vessel disorder, have severe kidney or liver problems, suffer from anemia, low white blood cell counts or low platelets, have drowsiness, slow breathing or weak pulse, have decreased alertness caused by taking certain medicines or drinking alcohol, are going to receive anesthesia in the spine or other regions in the body, are going to have a special X-ray examination of the brain or spinal cord involving a chemical called metrizamide. Trifluoperazine may impair the mental and physical abilities required for the performance of hazardous tasks such as driving a car or operating machinery, especially during the first few days of therapy. You should be cautious when performing these tasks. Stelazine may interact with cough and cold medications, anti-anxiety agents, antidepressants, anti-seizure medicine, high blood pressure medicine, cabergoline, lithium, cisapride, atropine-like drugs, narcotic pain relievers (e.g., codeine), drugs used to aid sleep, drowsiness-causing antihistamines or other drugs (e.g., diphenhydramine), metrizamide, anesthetics used prior to surgery, medicines for Parkinson’s disease (e.g. levodopa), blood thinning medicines (anticoagulants such as warfarin), antacids, medicines for psychiatric conditions (neuroleptics), heart medicines which prolong the QT interval (e.g. quinidine, disopyramide, procainamide, amiodarone, sotalol), drugs causing electrolyte imbalances (e.g. diuretics). Trifluoperazine can add to the effects of alcohol. You should avoid consuming alcoholic beverages while on Trifluoperazine therapy.