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Drugs Information Healthline

What is Cephalexin? Risks and Benefits!

Highlights for Cephalexin

  1. Cephalexin oral capsule is available as a generic drug and as a brand-name drug. Brand name: Keflex.
  2. Cephalexin also comes as a tablet or liquid suspension that you take by mouth.
  3. Cephalexin oral capsule is used to treat certain infections caused by bacteria.

Important warnings

  • Allergy to β-lactam medications warning: If you’re allergic to β-lactam medications, many of which are antibiotics, you should not take this drug. You could have a serious allergic reaction.
  • Antibiotic-associated diarrhea warning: The use of almost all antibiotics, including cephalexin, can cause a reaction that leads to diarrhea. In addition to diarrhea, this reaction can cause severe inflammation of your colon. Severe cases of this reaction can be fatal (cause death). Call your doctor if you have diarrhea while taking or after taking this drug.

What is Cephalexin?

Cephalexin oral capsule is a prescription drug that’s available as the brand-name drug Keflex and as a generic drug. Generic drugs usually cost less than the brand-name version. In some cases, they may not be available in all strengths or forms as the brand-name drug.
Cephalexin also comes as an oral tablet and an oral suspension.

Why it’s used

Cephalexin is used to treat certain infections caused by bacteria. These infections include:

How it works

Cephalexin belongs to a class of drugs called cephalosporins (antibiotics). A class of drugs is a group of medications that work in a similar way. These drugs are often used to treat similar conditions.
Cephalexin works by interfering with the formation of the bacteria’s cell walls. This ruptures the walls and kills the bacteria.
This drug should only be used to treat bacterial infections. You should not use it to treat viruses, such as the common cold.

Cephalexin side effects

Cephalexin oral capsule doesn’t cause drowsiness. However, it can cause other side effects.
More common side effects
The more common side effects of cephalexin oral capsule include:
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