Prescription onlyLower-cost generic availableClass: Infection



Prescription onlyLower-cost generic availableClass: Infection
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Treats bacterial infections.

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Our bottom line

Keflex (cephalexin) is good for treating many bacterial infections, and is available as a generic.

Price and discounts
Best available price for 40 (500mg) capsules of cephalexin


  • Available in generic.
  • Available in different forms: tablet, capsule, and suspension.
  • Used to treat many types of bacterial infections.
  • Can be taken with or without food.
  • Generally few side effects compared with other antibiotics.
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  • Can cause diarrhea.
  • You may need to take Keflex (cephalexin) 2 to 4 times a day, which can be hard to remember.
  • If you're allergic to penicillins or other antibiotics, you might not be able to take this medicine.
How it works

Keflex (cephalexin) is an antibiotic. It kills bacteria by preventing them from making their own protective covering.

What to expect when you take Keflex (cephalexin) for Infection

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Side effect rates for Keflex (cephalexin)

Risks and Warnings for Keflex (cephalexin)

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  • As with all antibiotics, Keflex (cephalexin) can cause diarrhea. It usually goes away after you're done with the medicine. Taking yogurt or probiotic supplements a few hours after you take the medication may help. Rarely, some people can have a severe form of diarrhea that happens a few weeks after you take Keflex (cephalexin). The symptoms include severe pain with loose or bloody stools. Talk to your doctor right away if this happens.

Common concerns from people taking Keflex (cephalexin)

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  • Can be taken with or without food.
  • Can take with or without food.