PRECAUTIONS: Before using this drug, tell your doctor your medical history including: liver or kidney disease, blood disorders, drug allergies. This medicine may make you more prone to sunburn. Wear protective clothing and a sunscreen when outdoors. This medication should be used only if clearly needed during pregnancy. Discuss the risks and benefits with your doctor. This drug is excreted into breast milk and may have an effect on a nursing infant. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Tell your doctor of all the medicines you may use (both prescription and nonprescription), especially of: warfarin, methotrexate, cyclosporine, certain oral drugs for diabetes (sulfonylureas), phenytoin, oral PABA. This drug may interfere with the effectiveness of birth control pills. Discuss using other methods of birth control with your doctor. 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 loss of appetite, nausea/vomiting, dizziness, headache, drowsiness, unconsciousness, fever, pain while urinating, or bruising.

NOTES: It is recommended to drink plenty of fluids while taking this medication unless your doctor directs you otherwise. This medication has been prescribed for your current condition only. Do not use it later for another infection or give it to someone else. A different medication may be needed in those cases.

MISSED DOSE: If you should miss a dose, take it as soon as remembered unless it is almost time for the next dose. If it is nearly time for the next dose, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose.

STORAGE: Store at room temperature away from moisture and sunlight. Do not store in the bathroom. Do not freeze liquid forms.

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.