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 AMPICILLIN BRAND NAME:-AMPICLIN,ROSCILLIN,BIOCILIN 250mg cap; 125,250mg/5ml dry syr; 100mg/ ml pediatric drops ; 250,500mg and 1.0 g per vial inj. AMPICILLIN is a extended spectrum penicillins of Aminopenicillins group drug . It is active against all organisms sensitive to PnG . In addition,many gram-negative bacilli,e g H. Influenzae, E.coli, Proteus salmonella Shigella and Helicobacter pylori are inhibited. However,due to wide- spread use ,many of these have developed resistance ; usefulness of the antibiotics has decreased considerably. AMPICILLIN is more active than PnG for Strep. Viridans , enterococci and Listeria ; equally active for pneumococci , gonococci and meningococci ( penicillin - resistant strains are resistant to ampicillin as well); but less active against other gram- postive cocci. Penicillinase producing Staph. are not affected, as are other gram-negative bacilli,such as Pseudomonas, Klebsiella, indole positive Proteus and anaerobes like Bacteroides fragilis. P...