Ampicillin is an antibiotic belonging to the aminopenicillin class of the penicillin family. The drug is used to prevent and treat several bacterial infections, such as respiratory tract infections, urinary tract infections, meningitis, salmonellosis, and endocarditis. [6] Learn about ampicillin usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. What is ampicillin? Ampicillin is a penicillin antibiotic that is used to treat or prevent many different types of infections such as bladder infections, pneumonia, gonorrhea, meningitis, or infections of the stomach or intestines. Ampicillin package insert / prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions and pharmacology. Ampicillin is an antibiotic that is commonly used for infections caused by certain bacteria. Ampicillin may not be appropriate for all infections, depending on which germs are causing the. AMUSCULAR OR INTRAVENOUS USE To reduce the development of drug-resistant bacteria and maintain the effectiveness of Ampicillin and other antibacterial drugs, Ampicillin for Injection, USP. Ampicillin: learn about side effects, dosage, special precautions, and more on MedlinePlus Ampicillin is a prescription penicillin-type antibiotic used to treat many different types of infections caused by bacteria, such as ear infections, bladder infections, pneumonia, gonorrhea, and E. coli or salmonella infection. Ampicillin is an antibiotic used for treating infections of the middle ear, sinuses, stomach and intestines, bladder, and kidney caused by susceptible bacteria. It also is used for treating uncomplicated gonorrhea, meningitis, endocarditis, and other serious infections. Ampicillin is a type of penicillin antibiotic that treats some bacterial infections. The brand name of this medication is Principen.