Cefalexin is contraindicated in patients with known allergy to the cost of keflex 500mg group of antibiotics. Keflex is a cephalosporin antibiotic used in treatment of respiratory infections and ear ...

Cephalexin is a generic prescription drug that treats infections. Only the oral capsule comes in a brand-name version called Keflex. Cephalexin can cause side effects ranging from mild to serious.