Uses. Cefdinir is used to treat a wide variety of bacterial infections. This medication is known as a cephalosporin antibiotic. It works by stopping the growth of bacteria. SIDE EFFECTS Adverse Events Clinical Trials - OMNICEF Capsules (Adult and Adolescent Patients) In clinical trials, 5093 adult and adolescent patients (3841 US and 1252 non-US) were treated with the recommended dose of cefdinir capsules (600 mg/day). Images of Imprint Z 66 pills including atenolol and cefdinir. Compare prices, print coupons, and view information for thousands of prescription drugs. Find information about which conditions Cefdinir Oral is commonly used to treat. View images of Cefdinir and identify pills by imprint code, shape and color with the Drugs.com Pill Identifier. Compare prices, print coupons and get savings tips for Cefdinir (Generic Omnicef) and other Skin Infection, Ear Infection, Lower Respiratory Infection, Pneumonia, Upper Respiratory Infection, and Sinus Infection drugs at CVS, Walgreens, and other pharmacies. Prices start at $18.06 Pill with imprint LUPIN LUPIN CEFDINIR CEFDINIR is Blue / Purple, Capsule-shape and has been identified as Cefdinir 300 mg. It is supplied by Lupin Pharmaceuticals, Inc. Pictures of Omnicef (Cefdinir), drug imprint information, side effects for the patient.