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DRUG INTERACTIONS: Tell your doctor of all prescription and nonprescription medications you use, especially of: amantadine, quinidine, disopyramide, procainamide, digoxin, ketoconazole, antacids, potassium supplements, phenothiazines (e.g., chlorpromazine, promethazine), medications for Parkinson's disease, medications used for depression, allergy medications. Do not start or stop any medicine without doctor or pharmacist approval.

OVERDOSE: If overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US national poison hotline at 1-800-222-1222. Canadian residents should call their local poison control center directly. Symptoms of overdose may include restlessness, seizures, mental or mood changes, hallucinations, large pupils, blurred vision, severe dry mouth, fever, nausea/vomiting, rapid heart beat, headache, weakness, dizziness, shallow and slow breathing, or unconsciousness.

NOTES: Do not share this medication with others.

MISSED DOSE: If you miss a dose, take it as soon as remembered; do not take if it is almost time for the next dose. Instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.

STORAGE: Store at room temperature between 59 and 86 degrees F (between 15 and 30 degrees C) away from moisture and sunlight unless otherwise directed. Do not store in the bathroom.

MEDICAL ALERT: Your condition can cause complications in a medical emergency. For enrollment information call MedicAlert at 1-800-854-1166 (USA), or 1-800-668-1507 (Canada).

Report Problems to the Food and Drug Administration   You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088. Need help identifying pills and medications? Use the pill identifier tool on RxList.