Cephalexin is a cephalosporin antibiotic. It is manufactured in the laboratory by the process known as fermentation and by general chemical reaction, and is classified as a semisynthetic antibiotic. Because the effectiveness of the antibiotic is determined by the drug’s ability to destroy the cell wall of the invading bacteria, it is very important that the patient completely follow the doctor’s prescribing directions. These directions include spacing of doses as well as the number of days the patient should continue taking the medicine. If they are not followed, the effect of the antibiotic is severely reduced.
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