Cefdinir is an antibiotic prescribed to treat a wide range of bacterial infections, including certain types of pneumonia, sinusitis, bronchitis, strep throat, sore throat, middle-ear infections. Cefdinir and Keflex (cephalexin) are cephalosporin antibiotics used to treat infections caused by susceptible bacteria such as infections of the tonsils (tonsillitis), throat (strep throat), middle ear (otitis media), larynx , bronchi , lungs , sinuses , and skin and other soft tissues. How to use Cefdinir Capsule. Take this medication by mouth with or without food as directed by your doctor, usually once a day or twice a day (every 12 hours). Compare Cefdinir vs. Cephalexin, which is better for uses like: Infection, Bacterial Infection and Pneumonia. Compare head-to-head ratings, side effects, warnings, dosages, interactions and patient reviews. Patients rated Cefdinir 3/5 over Cephalexin 2.9/5 in overall satisfaction. Summary. Cefdinir and cefixime (Suprax) are 3rd generation antibiotics called cephalosporins. Cefdinir and cefixime share similar side effects like abdominal pain, headache, rash, vaginitis, diarrhea, nausea, and vomiting. Cephalexin is a cephalosporin (SEF a low spor in) antibiotic. It works by fighting bacteria in your body. Cephalexin is used to treat infections caused by bacteria, including upper respiratory infections, ear infections, skin infections, urinary tract infections and bone infections. Cefdinir and Keflex (cephalexin) are cephalosporin antibiotics used to treat infections caused by susceptible bacteria such as infections of the tonsils (tonsillitis), throat (strep throat), middle ear (otitis media), larynx , bronchi , lungs , sinuses , and skin and other soft tissues. Omnicef (cefdinir) is good for treating many common bacterial infections. Keflex (cephalexin) is good for treating many bacterial infections, and is available as a generic. Keflex (cephalexin) is good for treating many bacterial infections, and is available as a generic. Compare Cefdinir vs. Keflex, which is better for uses like: Infection, Pneumonia and Bacterial Infection. Compare head-to-head ratings, side effects, warnings, dosages, interactions and patient reviews. Patients rated Cefdinir 3/5 over Keflex 2.9/5 in overall satisfaction. Compare Augmentin vs Cefdinir head-to-head for uses, ratings, cost, side effects, interactions and more. Augmentin rated 6.0/10 vs Cefdinir rated 4.5/10 in overall patient satisfaction. Augmentin rated 6.0/10 vs Cefdinir rated 4.5/10 in overall patient satisfaction.