-allopurinol
-female hormones, including contraceptive or birth control pills
-probenecid
-some other antibiotics given by injection

They need to know if you have any of these conditions:
-heart disease
-kidney disease
-mononucleosis
-an unusual or allergic reaction to ampicillin, other penicillins or antibiotics, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Tell your doctor or health care provider if your symptoms do not improve or if you get new symptoms.

This medicine may cause serious skin reactions. They can happen weeks to months after starting the medicine. Contact your health care provider right away if you notice fevers or flu-like symptoms with a rash. The rash may be red or purple and then turn into blisters or peeling of the skin. Or, you might notice a red rash with swelling of the face, lips or lymph nodes in your neck or under your arms.

Do not treat diarrhea with over the counter products. Contact your doctor if you have diarrhea that lasts more than 2 days or if the diarrhea is severe and watery.

This medicine can interfere with some urine glucose tests. If you use such tests, talk with your health care provider.

Birth control pills may not work properly while you are taking this medicine. Talk to your doctor about using an extra method of birth control.

Keep out of the reach of children and pets.

You will be instructed on how to store this drug. Throw away any unused drug after the expiration date.