Antibiotics Home > Liquid Keflex

A healthcare provider may prescribe Keflex® (cephalexin) for treating various bacterial infections or for preventing heart valve infections (bacterial endocarditis). This medication is approved for use in adults, children, and even infants.
This prescription antibiotic comes in the form of capsules or a liquid. Keflex oral suspension (liquid) comes in the following strengths:
  • Keflex suspension 125 mg/5 mL -- each teaspoon (5 mL) containing 125 mg of cephalexin
  • Keflex suspension 250 mg/5 mL -- each teaspoon (5 mL) containing 250 mg of cephalexin.
Keflex works by preventing 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.
The liquid version is usually taken two to four times a day, depending on your healthcare provider's instructions and the particular product. Although most people tolerate this medication well, side effects are possible and may include headaches, diarrhea, and nausea.
(Click Keflex for more information on the liquid and capsule forms of this product. This article discusses general dosing guidelines, safety precautions, tips on effectively using this medication, and more.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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