Keflex® (cephalexin) is an oral medication approved for the treatment of various bacterial infections, such as skin infections, bronchitis, or urinary tract infections. It is also licensed to prevent heart valve infections (bacterial endocarditis). There are two different forms of Keflex: oral solution and capsules.
This antibiotic prevents bacteria from making and maintaining their cell wall. Without a cell wall, bacteria are vulnerable and ultimately die. As a result, the infection is kept from spreading within the body.
Both capsule and oral solution forms of Keflex are typically taken two to four times a day, depending on the particular type of infection being treated. For Keflex to work properly, you have to take it as prescribed. Make sure that you complete your entire prescription, even if you start feeling better, to ensure that the infection is completely treated.
In addition, never take outdated Keflex; taking any outdated medication may cause serious problems because the intended effects often change after the medicine expires.
(Click Keflex to learn about the specific effects of Keflex, for more detailed dosing guidelines, and to find out what you should discuss with your healthcare provider before starting this medicine.)
Written by/reviewed by: Kristi Monson, PharmD;Arthur Schoenstadt, MD
Food and Drug Administration, Center for Drug Evaluation and Research. Electronic orange book: Approved drug products with therapeutic equivalence evaluations. FDA Web site. Available at: http://www.fda.gov/cder/ob/.
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