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Print Print. Penicillin is a group of antibiotics that are commonly used to treat different types of gram positive and gram negative bacterial infections. In their structure, beta lactam ring is located due to this reason these drugs are also called as beta lactam antibiotics.
Penicillins are all Î²-Lactam (Beta-Lactam) antibiotics, which are antibiotic molecules with a Î²-Lactam nucleus. There are a number of penicillin types, that react to bacteria in a variety of degrees, some of these are: 1  ampicillin. 2  amoxicillin. 3  flucloxacillin. 4  phenoxymethylpenicillin.hey are mainly bactericidal, are especially active against gram-positive organisms, and, with the exception of hypersensitivity reactions, show a particularly low toxic action on animal tissue. Penicillins are a certain collection of antibiotics that eliminate infection causing bacteria.