For a 15 lb dog, the typical Keflex (cephalexin) dose is 150–225 mg every 12 hours (10–15 mg per pound). Always confirm with your veterinarian before giving any medication.
How much Keflex Can I give my dog?
The standard dosage of Keflex (cephalexin) for dogs is 10 to 15 mg per pound of body weight, given every 8 to 12 hours by mouth.
Say your pup weighs 30 lbs—that means 300–450 mg per dose. If your dog has kidney issues, the vet may adjust this. Never deviate from the prescription, no matter what.
Can dogs take Keflex 500 mg?
Yes, dogs can safely take 500 mg of Keflex (cephalexin), but only if the dog weighs about 33 kg (73.5 lb) or more.
Handing a 500 mg pill to a tiny Chihuahua? That’s a fast track to trouble. Always match the dose to your dog’s weight and run it by your vet first. Side effects aren’t worth the gamble.
Is 2000 mg of cephalexin too much for a dog?
A 2000 mg dose of cephalexin is only appropriate for very large dogs weighing around 150 pounds.
For a 20-pound terrier? That’s like giving a toddler a triple espresso. Overdoing it can trigger vomiting, diarrhea, or even kidney damage. Stick to what the vet ordered—no exceptions.
What is cephalexin 250 mg used for in dogs?
Cephalexin 250 mg is commonly used to treat bacterial skin infections such as pyoderma in dogs.
It also tackles urinary tract infections, bone infections, and some respiratory bugs. The drug works by halting bacterial growth, giving your dog’s immune system a fighting chance.
Is 1000 mg of cephalexin too much for a dog?
A 1000 mg dose of cephalexin is appropriate for a dog weighing approximately 75 pounds.
That’s roughly 13.3 mg per pound—right in the sweet spot of the recommended 10–15 mg range. Still, always double-check with your vet. Strength and timing matter just as much as the math.
Will cephalexin hurt my dog?
Cephalexin is generally safe for dogs, and overdoses rarely cause serious harm.
Most pups handle it fine, though some might vomit or get the runs. Push the dose too high, though, and you risk anemia or kidney trouble. Keep an eye out for anything off. When in doubt, call the vet.
Can you crush cephalexin for dogs?
Yes, you can open the capsule and mix the powder with food for dogs.
Stir it in thoroughly—this stuff tastes bitter, and you want every last speck gone. Skip crushing tablets unless your vet gives the green light; some are time-release and shouldn’t be tampered with.
What is Keflex used for in dogs?
Vets also prescribe it after surgeries or for infected wounds. Finish the whole course, even if your dog starts feeling better. Quitting early can let the bacteria bounce back stronger.
Is sulfamethoxazole safe for dogs?
Sulfamethoxazole/trimethoprim should not be used in dogs with liver damage, blood disorders, dehydration, or sulfonamide allergies.
(Honestly, this drug isn’t the first choice for most pups.) Dobermans seem especially sensitive. Always spill the medical tea—past issues, meds, supplements—before starting antibiotics.
What is the best antibiotic for dogs with skin infection?
Cephalexin, clindamycin, and erythromycin are commonly prescribed antibiotics for treating bacterial skin infections in dogs.
Don’t overlook topical helpers, either—antibiotic ointments and medicated shampoos can speed things up. Your vet will pick the best weapon based on the bug and how deep it’s burrowed.
How long should I give my dog cephalexin?
Cephalexin is typically prescribed for 7 to 10 days, depending on the infection being treated.
Got a stubborn case of pyoderma? You might be looking at 6–8 weeks. Whatever the timeline, don’t quit early—even if your dog’s back to zoomies. Stopping mid-course breeds superbugs.
Can a dog overdose on cephalexin?
A dog can overdose on cephalexin, which may cause vomiting, diarrhea, anemia, or kidney damage.
If you suspect your dog wolfed down extra pills, call the vet or an emergency animal hospital ASAP. Lock up meds like you would chocolate—out of sight, out of reach.
Can I give my dog Benadryl with cephalexin?
No known harmful interactions exist between Benadryl (diphenhydramine) and cephalexin.
Still, run the combo by your vet. They’ll weigh risks if your dog’s on other meds or has hidden health quirks. Better safe than sorry.
How many times a day should I give my dog cephalexin?
Cephalexin is typically given twice daily, every 12 hours, for the prescribed duration.
Severe infections might call for every-8-hour dosing. Whatever the schedule, set phone alarms—consistency keeps the drug working.
Is cephalexin 500mg for dogs the same as humans?
Cephalexin 500 mg is the same active ingredient used in both human and veterinary formulations.
The FDA has approved it for dogs, but don’t raid your own medicine cabinet. Human doses aren’t one-size-fits-all for pets—weight and condition matter. Always get vet sign-off.
How much does cephalexin for dogs cost?
| Strength | Quantity | Approximate Cost |
|---|
| 250 mg | 100 tablets | About $10 |
| 500 mg | 100 tablets | About $15 |
| 500 mg | 500 tablets | About $55 |
Prices swing wildly—pharmacy to pharmacy, town to town, and whether you’ve got a discount card in your wallet. Generics are cheap and just as good, so ask your vet about them.
How long should my dog take cephalexin for a skin infection?
For a skin infection like pyoderma, cephalexin is typically prescribed for 6 to 8 weeks.
Got a surface-level scrape? Two weeks may do the trick. Deeper or repeat offenders need the long haul. Follow the vet’s script to the letter—half-measures let infections linger.
Edited and fact-checked by the FixAnswer editorial team.
