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cephalexin
Used for Bacterial Infection, Ear Infection, Lower Respiratory Infection, Skin Infection, Upper Respiratory Infection, Urinary Tract Infection
Used for Bacterial Infection, Ear Infection, Lower Respiratory Infection, Skin Infection, Upper Respiratory Infection, Urinary Tract Infection
Cephalexin is a cephalosporin antibiotic that treats different types of bacterial infections in cats and dogs, including skin infections, urinary tract infections (UTIs), and ear infections. It’s commercially available as tablets, capsules, and liquid, and is often prescribed off-label for pets to help them fight infections. You’ll usually give it to your pet by mouth twice a day. The most common side effects are diarrhea, vomiting, and reduced appetite.
What is Cephalexin for pets?
What is Cephalexin for pets used for?
- Skin infections
- Urinary tract infections (UTIs)
- Ear infections
- Bone infections
- Abscesses
- Infected wounds
How Cephalexin for pets works
Cephalexin is a cephalosporin antibiotic. It kills bacteria by preventing them from forming their protective outer walls around their cells, which they need to survive.
Drug facts
| Common Brands | Keflex |
|---|---|
| Drug Class | Cephalosporin antibiotic |
| Controlled Substance Classification | Not a controlled medication |
| Generic Status | Lower-cost generic available |
| Availability | Prescription only |
More on Cephalexin essentials
Side effects of Cephalexin for pets
The following side effects might get better over time as your pet gets used to the medication. Let your veterinarian know immediately if your pet continues to experience these symptoms or if they worsen over time.
Common Side Effects
- Diarrhea
- Vomiting
- Reduced appetite
Less Common Side Effects
Cephalexin serious side effects
Contact your veterinarian immediately if your pet experiences any of the following.
- Allergic reaction: rash, hives, fever, trouble breathing, facial swelling, pale gums
- Serious skin reaction: red patches on the skin, sores or blisters, itchy skin, ulcers in the mouth
The following Cephalexin side effects have also been reported
Side effects that you should report to your care team as soon as possible:
- Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
- Redness, blistering, peeling, or loosening of the skin, including inside the mouth
- Severe diarrhea, fever
- Unusual vaginal discharge, itching, or odor
Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome):
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Pros and cons of Cephalexin for pets
Pros
- First-choice treatment for some skin infections in pets
- Available as tablets, capsules, and a liquid
- Can be given with food
Cons
- Might need to be given multiple times a day
- Doesn’t work for viral infections
- Can cause diarrhea, vomiting, or reduced appetite
Pharmacist tips for Cephalexin for pets
- Cephalexin can be given with or without food, but it’s best to give it with food to prevent an upset stomach.
- If you’re allergic to penicillin or cephalosporin antibiotics, handle cephalexin carefully since touching it could cause a reaction. If needed, someone without an allergy can give the medication to your pet or you can wear gloves for extra protection.
- Even if your pet starts to feel better, it’s important to give the entire course of cephalexin as prescribed. Stopping the medication too soon can lead to antimicrobial resistance and might cause the infection to become even harder to treat.
- Cephalexin hasn’t been well studied in pregnant or nursing dogs and cats. If your pet is pregnant or lactating, talk with your veterinarian to weigh the risks and benefits before giving this medication.
- Store the liquid form of cephalexin in the refrigerator. Make sure to throw it away 14 days after you open it.
Risks and warnings for Cephalexin for pets
Cephalexin can cause some serious health issues. This risk might be even higher for certain pets. If this worries you, talk to your veterinarian about other options.
Allergic reaction
- Risk factors: Allergy to penicillin antibiotics | Allergy to other cephalosporin antibiotics
If your pet is allergic to penicillin, there’s a chance they could also react to Cephalexin. The risk is also higher if your pet has had a reaction to other cephalosporin antibiotics. Talk to your vet right away if you notice signs of an allergic reaction, like a rash, fever, hives, or trouble breathing.
Cephalexin dosage forms for pets
The average cost for 28 capsules of 500mg of Cephalexin is $9.96 with a free GoodRx coupon. This is 84.68% off the average retail price of $65.00. 
Bottle of oral suspension
Bottle of oral suspension| Dosage | Quantity | Price as low as | Price per unit |
|---|---|---|---|
| 200ml of 125mg/5ml | 1 bottle | $13.11 | $13.11 |
| 100ml of 125mg/5ml | 1 bottle | $11.08 | $11.08 |
| 200ml of 250mg/5ml | 1 bottle | $21.35 | $21.35 |
| 100ml of 250mg/5ml | 1 bottle | $12.97 | $12.97 |
Typical dosage for Cephalexin
The dose will depend on your pet’s weight and the type of infection they have. Here are a few examples of typical dosing:
Dogs:
- Skin infections and urinary tract infections (UTIs): The typical dose is 15 mg/kg to 30 mg/kg by mouth every 12 hours. In many cases, vets start closer to 22 mg/kg to 30 mg/kg, depending on your dog’s health and how they respond to the medication.
Cats:
- Skin infections and urinary tract infections (UTIs): The typical dose is 15 mg/kg to 30 mg/kg by mouth every 12 hours. In many cases, vets start closer to 22 mg/kg to 30 mg/kg, depending on your cat’s health and how they respond to the medication.
How much does Cephalexin cost?
To access savings, use a GoodRx coupon and pay just a fraction of the retail price.
Cephalexin (generic)
$9.96
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Cephalexin images
