Precautions

It is important that your doctor check your progress after treatment. This is to make sure that the infection is cleared up completely, and to allow your doctor to check for any unwanted effects. Blood tests may be needed to check for unwanted effects.

If your symptoms do not improve, or if they become worse, check with your doctor. You may need to take this medicine for several weeks or months before your infection gets better.

Do not use this medicine together with carbamazepine (Tegretol®), ketoconazole (Nizoral®), phenobarbital (Luminal®), rifampin (Rifadin®, Rimactane®), ritonavir (Norvir®), or St. John's wort. Using these medicines together may cause unwanted effects.

Make sure your doctor knows if you are pregnant or planning to get pregnant before you start using this medicine. If you think you have become pregnant while using the medicine, tell your doctor right away.

Check with your doctor right away if you have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, vomiting, or yellow eyes or skin. These could be symptoms of a serious liver problem.

This medicine may cause serious allergic reactions, including anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Tell your doctor right away if you have a rash, itching, trouble breathing, trouble swallowing, or any swelling of your hands, face, or mouth while you are using this medicine.

Serious skin reactions can occur with this medicine. Check with your doctor right away if you have blistering, peeling, or loose skin, red skin lesions, severe acne or skin rash, sores or ulcers on the skin, or fever or chills while you are using this medicine.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.