About Cefdinir Semisynthetic (Third Generation ) cephalosporin antibiotic, Oral broad-spectrum antibiotic. Mechanism of Action Cefdinir is a 3rd generation cephalosporin which exerts its bactericidal action against both gram positive & aerobic gram negative organisms by inhibiting bacterial cell wall synthesis. Cefdinir inhibits transpeptidase & thus prevents cross linking of bacterial cell wall. Transpeptidase & associated proteins constitute various types of specific binding proteins which have affinity for cephalosporins like Cefdinir Indications for Cefdinir 1.Pneumonia 2.Bronchitis 3.Pharyngitis 4.Tonsillitis 5.Skin & soft tissue infections 6.Otitismedia 7.Sinusitis