ampicillin

ampicillin /am·pi·cil·lin/ (am?pi-sil´in) a semisynthetic, acid-resistant, penicillinase-sensitive penicillin used as an antibacterial against many gram-negative and gram-positive bacteria; also used as the sodium salt.

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am·pi·cil·lin (mp-sln)

n.

A semisynthetic penicillin having a broader antibacterial spectrum of action than that of penicillin G. It is effective against gram-negative and gram-positive bacteria and used to treat gonorrhea and infections of the intestinal, urinary, and respiratory tracts.

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ampicillin (am´pisil´in),

n an acid-stable semisynthetic penicillin antibiotic with a broader spectrum of effectiveness than penicillin G.

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ampicillin

an aminopenicillin of synthetic origin, susceptible to ß-lactamase, with activity similar to amoxicillin but shorter duration of activity. It can be administered orally or parenterally.

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ampicillin Infectious disease An analogue of penicillin, which inhibits crosslinking of peptidoglycan chains in the eubacterial cell wall. Ampicillin is comparable to penicillin G against gram-positive bacteria, but more active against gram-negative bacilli Adverse effects Rash, especially if Pt also receiving allopurinol or actively infected with EBV