Prescribing-label excerpts
Cefdinir
Reference for: Cefdinir. Source presentation: powder, for suspension. Source route: oral.
The source label presents its clinical-pharmacology findings together. These selected passages retain the source’s study context; the full label provides the complete discussion.
Clinical pharmacology
Mechanism of Action — As with other cephalosporins, bactericidal activity of cefdinir results from inhibition of cell wall synthesis. Cefdinir is stable in the presence of some, but not all, β-lactamase enzymes. As a result, many organisms resistant to penicillins and some cephalosporins are susceptible to cefdinir.
Mechanism of Resistance — Resistance to cefdinir is primarily through hydrolysis by some β-lactamases, alteration of penicillin-binding proteins (PBPs) and decreased permeability. Cefdinir is inactive against most strains of Enterobacterspp., Pseudomonasspp., Enterococcusspp., penicillin-resistant streptococci, and methicillin-resistant staphylococci. β-lactamase negative, ampicillin-resistant (BLNAR) H. influenzaestrains are typically non-susceptible to cefdinir.
Antimicrobial Activity — Cefdinir has been shown to be active against most strains of the following microorganisms, both in vitroand in clinical infections as described in INDICATIONS AND USAGE .
Selected passages from the cited U.S. prescribing label. The studies concern the source product and populations named in each passage; they do not establish Walter-product bioequivalence, an approved indication, or the kinetics of another fixed combination. Tables and the full prescribing information remain available in the source.
Source: DailyMed: Cefdinir — powder, for suspension
Reference accessed . Label revision: 2026-09-01.
