Cefdinir belongs to which generation of cephalosporins?

• A. 1st gen
• B. 2nd gen
• C. 3rd gen
• D. 4th gen

Answer: (B)

Cephalosporin generations reflect changes in antimicrobial spectrum and behavior. Cefdinir is an oral third-generation cephalosporin. It shows expanded Gram-negative coverage, including many Enterobacteriaceae, and good activity against common respiratory pathogens like Haemophilus influenzae and Moraxella catarrhalis, which is characteristic of the third generation. It doesn’t have the strong anti-pseudomonal activity associated with some fourth-generation agents and doesn’t emphasize Gram-positive coverage as in earlier generations. So cefdinir is classified as a third-generation cephalosporin.