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Cephalexin and hcpcs: "Keflex is a semi-synthetic cephalosporin antibiotic for oral administration. Keflex is a cephalosporin antibiotic and is used to treat certain infections caused by bacteria such as pneumonia and bone, ear, skin, and urinary tract infections. It's important to take the full dosage schedule of Keflex, even if you're feeling better in a few days. Keflex is a semi-synthetic cephalosporin antibiotic for oral administration. Serious interactions of Cephalexin with other drugs are uncommon."