Before taking ampicillin, tell your doctor and pharmacist if you are allergic to ampicillin, penicillin, or any other drugs. tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially other antibiotics, allopurinol (Lopurin), anticoagulants (blood thinners) such as warfarin (Coumadin), atenolol (Tenormin), oral contraceptives, probenecid (Benemid), rifampin, sulfasalazine, and vitamins. tell your doctor if you have or have ever had kidney or liver disease, allergies, asthma, blood disease, colitis, stomach problems, or hay fever. tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking ampicillin, call your doctor. if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking ampicillin. |