DRUG INTERACTIONS: Tell your doctor of any over-the-counter or prescription medication you may take, including: blood pressure drugs, sedatives, tranquilizers, sleeping pills, MAO inhibitors (e.g., furazolidone, linezolid, phenelzine, selegiline, tranylcypromine), narcotic pain medications (e.g., codeine). 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 nausea; vomiting; blurred vision; drowsiness; slowed breathing; large, unchanging pupils; seizures; and deep sleep or loss of consciousness.

NOTES: Drink plenty of fluids, especially water while taking this medication. It will help to break up mucus and clear congestion.

MISSED DOSE: If you miss a dose, take it as soon as remembered; do not take it if it is near the 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 (59 to 86 degrees F or 15 to 30 degrees C) away from sunlight. Do not store in the bathroom.