Ampicillin (injection)

Generic name: ampicillin (injection) [ AMP-i-sil-in ]
Brand names: Omnipen-N, Totacillin-N
Dosage form: injectable powder for injection (1 g; 10 g; 125 mg; 2 g; 250 mg; 500 mg)
Drug class:Aminopenicillins

Medically reviewed by Drugs.com on Apr 14, 2022. Written by Cerner Multum.

What is ampicillin injection?

Ampicillin is a penicillin antibiotic that fights bacteria.

Ampicillin injection is used to treat or prevent many different types of infections such as bladder infections, pneumonia, meningitis, gonorrhea, and infections of the stomach, intestines, heart, or blood.

Ampicillin may also be used for purposes not listed in this medication guide.

Warnings

You should not use ampicillin if you are allergic to any penicillin antibiotic.

Before taking this medicine

You should not use this medicine if you are allergic to ampicillin or to any other penicillin antibiotic, such as amoxicillin (Amoxil, Augmentin, Moxatag, and others), carbenicillin, dicloxacillin, or penicillin.

To make sure ampicillin is safe for you, tell your doctor if you have:

• allergies to any foods or drugs;

• an allergy to a cephalosporin antibiotic, such as cefdinir (Omnicef),