Omnicef is an oral third-generation cephalosporin antibiotic used to treat bacterial infections. It works by binding to specific penicillin-binding proteins that are essential for building the bacterial cell wall. This binding prevents the cross-linking of peptidoglycan strands, weakening the cell wall structure. The compromised wall leads to osmotic instability and cell death in susceptible organisms. Clinically it is prescribed for conditions such as acute otitis media, sinusitis and community-acquired pneumonia. After oral administration the drug is absorbed into the bloodstream and distributed to sites of infection where it exerts its bactericidal activity.

Omnicef is an oral cephalosporin antibiotic prescribed for common bacterial infections of the lungs and skin. It kills bacteria by attaching to their penicillin-binding proteins that build the cell wall. This attachment blocks the linking of sugar molecules that give the wall its strength. Without a solid wall the bacterial cells burst and die. The medication is active against many gram-positive and gram-negative bacteria that cause these infections. Its action targets only bacterial structures leaving human cells unharmed.

Omnicef may cause mild diarrhea in some patients. Nausea and stomach discomfort are also reported. Some individuals experience headache or dizziness. Skin reactions such as rash or itching can occur. Abdominal pain is listed among the possible effects. In certain cases, mild vomiting may be observed. Changes in taste sensation have been documented. These effects are generally temporary and self-limited.

Omnicef may cause diarrhea, which is usually mild and resolves without treatment. In some cases it can lead to abdominal pain or cramping. Nausea and vomiting are also reported side effects. Headache and dizziness occur less frequently but are possible. Skin reactions such as rash or itching may develop in certain individuals. Rarely, the medication can cause yeast infections due to disruption of normal flora. These effects generally subside once the course of therapy ends.