It is important that your doctor check the progress of you or your child at regular visits to make sure that this medicine is working properly. Blood tests may be needed to check for any unwanted effects.
If your or your child's 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.
This medicine may cause a serious type of allergic reaction called anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Call your doctor right away if you have a skin rash, itching, hives, trouble with breathing or swallowing, or any swelling of your hands, face, or mouth while you or your child are using this medicine.
This medicine may cause serious liver problems, including liver failure. Check with your doctor right away if you start having nausea or vomiting, dark urine, light-colored stools, stomach pain, or yellow eyes or skin while you or your child are using this medicine.
This medicine may cause problems with your sense of taste or smell. Tell your doctor right away if you or your child have change or loss of sense of smell, change in taste or loss of taste, poor appetite, or weight loss.
You may become depressed when taking this medicine. Tell your doctor right away if you or your child thinks this medicine is causing changes in your mood or behavior. Other symptoms include feeling very sad or empty, irritable, lack of appetite, loss of interest or pleasure, restlessness, trouble concentrating, or trouble sleeping.
Serious skin reactions can occur with this medicine. Check with your doctor right away if you have blistering, peeling, or loosening of the skin, red skin lesions, severe acne or skin rash, sores or ulcers on the skin, or fever or chills while you or your child are using this medicine.
This medicine can temporarily lower the number of white blood cells in your blood, increasing the chance of getting an infection. If you can, avoid people with infections. Check with your doctor immediately if you think you are getting an infection or if you or your child get a fever or chills, cough or hoarseness, lower back or side pain, or painful or difficult urination.
This medicine may make your skin more sensitive to sunlight. Tell your doctor right away if you or your child have a red, scaly skin rash or unusual sensitivity of the skin to the sun. Use a sunscreen when you are outdoors. Avoid sunlamps and tanning beds.
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.