DRUG INTERACTIONS: Tell your doctor of all prescription and nonprescription drugs you may use, especially of: mefloquine (or if you have previously taken mefloquine). Report other drugs which affect the heart rhythm (QTc prolongation), such as: dofetilide, pimozide, quinidine, sotalol, procainamide, sparfloxacin, "water pills" (diuretics such as furosemide or hydrochlorothiazide). Ask your doctor or pharmacist for more details. 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 stomach pain, vomiting, cramping, diarrhea, and irregular heartbeat.

NOTES: Do not share this medication with others. Laboratory or medical tests may be performed to monitor your progress. Your heart rhythm (ECG) will be monitored during and for 8 to 12 hours after therapy.

MISSED DOSE: It is important not to miss any doses. However, if you do miss a dose, contact your doctor or pharmacist promptly to establish a new dosing schedule.

STORAGE: Store at room temperature between 68 to 77 degrees F (20 to 25 degrees C) away from light and moisture.

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.