MAXIPIME is a semi-synthetic, broad spectrum, cephalosporin antibiotic for parenteral administration. The chemical name is 1-[[(6R,7R)-7-[2-(2-amino-4-thiazolyl)-glyoxylamido]-2-carboxy-8-oxo-5-thia-1- azabicyclo[4.2.0] oct-2-en-3-yl]methyl]-1-methylpyrrolidinium chloride, 7²-(Z)-(O-methyloxime), monohydrochloride, monohydrate, which corresponds to the following structural formula:

Cefepime hydrochloride is a white to pale yellow powder. Cefepime hydrochloride contains the equivalent of not less than 825 µg and not more than 911 µg of cefepime (C₁₉H₂₄N₆O₅S₂) per mg, calculated on an anhydrous basis. It is highly soluble in water.

MAXIPIME for Injection is supplied for intramuscular or intravenous administration in strengths equivalent to 500 mg, 1 g, and 2 g of cefepime. (See DOSAGE AND ADMINISTRATION.) MAXIPIME is a sterile, dry mixture of cefepime hydrochloride and L-arginine. It contains the equivalent of not less than 90.0 percent and not more than 115.0 percent of the labeled amount of cefepime (C₁₉H₂₄N₆O₅S₂). The L-arginine, at an approximate concentration of 725 mg/g of cefepime, is added to control the pH of the constituted solution at 4.0–6.0. Freshly constituted solutions of MAXIPIME will range in color from colorless to amber.

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