Cephalexin Killed My Dog?

For those of you who don’t know what Cephalexin is, it’s an antibiotic that is used to treat bacterial infections such as UTIs and skin infections, etc. It’s also used to treat some forms of pneumonia and bronchitis.

It’s important to note that it does NOT kill viruses, which is why it cannot be used to treat colds and flu. Dogs, like people, can become allergic to almost anything and will develop internal problems when they ingest something they are allergic to, such as food or medication.

Can cephalexin kill a dog?

Cephalexin can kill a dog if not used properly. Always follow your veterinarian’s instructions for dosage and length of treatment when giving your dog any medication or drug. Dosing too much is likely to cause toxicity which can lead to death.

“My 10-year-old dog was recently prescribed Cephalexin for an ear infection, at first she seemed fine after taking the first dose but has since become listless, with no appetite, and won’t drink or pee at all. The vet thinks she may be suffering kidney failure and has recommended putting her down, is there something else we can do?”

“My dog was on Cephalexin for 10 days. After 6 days she became lethargic and had extremely loose stool. I stopped the Cephalexin and within 12 hours she was back to normal wagging her tail and a little hyper as usual. I have read that Cephalexin can cause kidney damage. Can anyone confirm this?”

“I wanted to tell you that your article saved my life. My dog was in kidney failure due to Cephalexin toxicity. Honestly, I didn’t know what else to do to save her. I had already taken her to two different vets and they didn’t seem to have a clue about what was causing her illnesses. In fact, one of them told me she had a slow leak in one of her kidneys and that there was nothing that could be done for her. In my research, I read that cephalexin is known for causing kidney damage in dogs and cats. I stopped the medicine immediately and within a few days, my dog was acting like a healthy puppy again. Today she is living a normal life and hasn’t suffered any more kidney problems since then. Thank you so much for posting this info online!”

Is cephalexin harmful to dogs?

Cephalexin can be used to treat and prevent infections. It works by killing bacteria or preventing them from growing.

Like all other antibiotics, it can cause allergic reactions in both dogs and people. These reactions include rashes, vomiting, diarrhea, hyperexcitability, rapid breathing, and other allergic reactions. If you notice these symptoms in your dog while taking cephalexin, contact your vet immediately.

How much Cephalexin should a dog take?

In general, the recommended dose for dogs is 22 mg/kg (10 mg/lb) of body weight twice daily for 28 days. This medication should be given to your pet with food to reduce the chance of stomach upset.

As a general rule, a medication dosage is based on the weight of the dog. This will provide you with a safe and effective dose. It is important to remember that dosages can be different depending on the condition being treated, as well as the size of the pet.

If you have any concerns about using this medication or if your pet has an allergy to it please speak with your veterinarian.

How much Cephalexin do you give a 50-pound dog?

Cephalexin is an antibiotic that comes in 500 mg capsules. You would need to give 1 capsule to a 50-pound dog. Be sure to follow the dosage instructions on the package to ensure that your dog gets the right amount for his size.

Can I stop giving my dog antibiotics?

You have to be careful how long you give your dog antibiotics. Although the infection may appear to be gone, it is possible that the bacterial infection has not been resolved completely. This leaves your dog vulnerable to a relapsed infection.

Giving your pet antibiotics for infection is standard practice at most vet offices, but it’s important to remember that you can’t just stop the antibiotics once the symptoms are better.

Work with your vet to find out how long you should continue giving antibiotics after symptoms subside, or you could risk a relapse.

Antibiotics are only one component of the treatment plan. While they’re killing off bacteria, it’s important to take care of your dog’s comfort and support his immune system through diet, exercise, and stress reduction.

Can you give a dog Cephalexin and Benadryl?

Taking Benadryl while taking cephalexin will not cause an interaction between them. We did not find any interactions listed for Benadryl and cephalexin.


Hannah Elizabeth is an English animal behavior author, having written for several online publications. With a degree in Animal Behaviour and over a decade of practical animal husbandry experience, Hannah's articles cover everything from pet care to wildlife conservation. When she isn't creating content for blog posts, Hannah enjoys long walks with her Rottweiler cross Senna, reading fantasy novels and breeding aquarium shrimp.

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