Cephalexin (Rx)

  • Cats
  • Dogs
  • Allergy

Why our vets recommend it

Cephalexin is a broad-spectrum antibiotic that’s effective against a variety of bacterial infections. Side effects are usually mild and rarely occur.

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Medication information

What is Cephalexin?

Cephalexin is a broad-spectrum antibiotic used to treat bacterial infections in dogs and cats caused by several strains of bacteria. It’s generally prescribed for skin infections (such as superficial pyoderma), urinary tract infections, ear infections, and respiratory infections (such as bronchitis), but may be used for other issues as well. 

What does Cephalexin treat?

Conditions that Cephalexin treats include:

  • Bacterial skin infections (such as superficial pyoderma)
  • Urinary tract infections
  • Ear infections
  • Respiratory infections

How is Cephalexin given?

Give liquid (oral suspension) Cephalexin to your pet according to your vet’s exact instructions. It must be mixed with water first. After mixing, keep refrigerated and shake well before use.

Who is Cephalexin for?

Cats and dogs.

What are the active ingredients of Cephalexin?


Generic for Keflex, Rilexine, and Vetolexin. 

What are the possible side effects of Cephalexin?

The most common side effects of this medication are related to stomach upset and include decreased appetite, vomiting, diarrhea, and lethargy. If any unwanted side effects, or changes in behavior or health, are detected, this medication should be discontinued and our veterinarians should be notified.

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