-aspirin and aspirin-like drugs
-birth control pills
-certain antibiotics given by injection
-medicines that treat or prevent blood clots like warfarin, heparin, enoxaparin, and dalteparin
-methotrexate
-probenecid
-vecuronium used for sleep during surgery

They need to know if you have any of these conditions:
-bleeding problems
-kidney disease
-salt restricted diet
-an unusual or allergic reaction to piperacillin, tazobactam, other penicillin or cephalosporin antibiotics, imipenem, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Tell your doctor or health care provider if your symptoms do not start to get better or if they get worse. Your doctor will monitor your condition and blood work as needed.

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 it is severe and watery.

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

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.