Omnicef (cefdinir) and amoxicillin are antibiotics used to treat many different types of infections caused by bacteria. These drugs belong to different drug classes. Omnicef is a cephalosporin antibiotic and amoxicillin is a penicillin -type antibiotic. The brand name Omnicef is discontinued in the U.S. Omnicef is available as generic cefdinir.Is Omnicef a sulfa based antibiotic?
Sulfamethoxazole-TrimethoprimThis medication is a combination of two antibiotics: sulfamethoxazole and trimethoprim. It is used to treat a wide variety of bacterial infections. It is also used to prevent and treat a certain type of pneumonia. This medication should not be used in children less than 2 months of age due to the risk of serious side effects. This medication treats only certain types of infections. is a combination of an anti-bacterial sulfonamide (a "sulfa" drug) and a folic acid inhibitor. CefdinirCefdinir is used to treat a wide variety of bacterial infections. is a cephalosporin antibiotic The brand name for cefdinir called Omnicef is discontinued in the U.S. Side effects of Bactrim and cefdinir that are similar include headache, diarrhea, nausea, vomiting, and skin rash.