Ampicillin (By mouth)

There may be other brand names for this medicine.

You should not use ampicillin if you have had an allergic reaction to any type of penicillin.

Your doctor will tell you how much to take and how often.
It is important that you keep taking the medicine for as long as your doctor tells you, even if you feel better.
Shake the oral liquid before each use.
Take the medicine on an empty stomach, 1 hour before or 2 hours after meals with a full glass of water.
Measure your medicine with a marked measuring spoon or medicine cup.

Store the capsules or tablets in a tightly closed container at room temperature away from heat, moisture, and light. Store the oral liquid in the refrigerator. Throw away any medicine that is left after 14 days. Do not freeze.
Keep all medicine out of the reach of children.

Make sure your doctor knows if you are taking estrogen, probenecid, blood thinners (such as Coumadin®), cholestyramine (Questran®), or colestipol (Colestid®).
Birth control pills may not work as well while taking penicillin. Use another kind of birth control while you are taking this medicine.
Ampicillin may cause incorrect results with some urine sugar tests used by people with diabetes.

If you have severe diarrhea, check with your doctor before taking any medicine to stop the diarrhea.
Make sure your doctor knows if you have ever had an allergic reaction to any cephalosporin antibiotic such as Keflex® or Ceclor® before you take ampicillin.
If your symptoms do not improve in a few days or become worse, call your doctor.
If you are pregnant or breastfeeding, talk to your doctor before taking ampicillin.
Make sure your doctor knows if you have mononucleosis ("mono"), stomach or intestinal disease, asthma, liver disease, hay fever, or other allergies before you take this medicine.

Last Updated: 1/27/2017