Hydrogen peroxide sits in many medicine cabinets, and online advice often suggests it for cleaning wounds or making a dog vomit after eating something bad. Most veterinary sources now advise against doing either at home without professional direction. This article explains why, and what to do instead.
This is general information and not a substitute for veterinary advice. If your dog may have swallowed something harmful, do not wait. If your pet may have eaten something toxic, call your vet or a poison helpline straight away: ASPCA Animal Poison Control Center, (888) 426-4435, or Pet Poison Helpline, (855) 764-7661. Both are open 24 hours a day and may charge a fee.
The short answer
Hydrogen peroxide is rarely a safe first choice for dogs. It can irritate tissue, it can cause problems when swallowed, and making a dog vomit is the wrong move in many situations. If a vet or poison helpline specifically tells you to use it, follow their exact instructions. Otherwise, it is better left in the cabinet.
Wounds and skin
It might seem logical that peroxide would clean a cut. It does bubble, and it can kill germs, but it can also damage healthy cells that the body needs to heal, so it may slow healing. Many vets recommend avoiding it on dog wounds.
Ears
Peroxide in the ear canal can irritate delicate skin and leave moisture behind, which may worsen inflammation or infection. If your dog has itchy, smelly, or painful ears, see a vet, who can check the eardrum and recommend an appropriate ear cleaner.
Inducing vomiting: why it is risky
The most common reason people reach for peroxide is to make a dog bring up something they swallowed. This is where the biggest risks lie:
- It can irritate the stomach and esophagus, and in some dogs cause inflammation or bleeding.
- Vomiting can continue longer than expected.
- Vomit can be inhaled into the lungs, which can cause serious illness.
- It may not work, and it may waste time during which the toxin is absorbed.
- Some things are more dangerous coming back up than staying down.
- Incorrect amounts can cause harm, and the right amount depends on the dog. We do not give amounts in this article because home dosing guesses are a common source of harm.
When vomiting should never be induced
Do not try to make a dog vomit without veterinary advice, and in particular not if the dog:
- Swallowed a caustic or corrosive substance, such as cleaning products or batteries
- Swallowed petroleum products such as gasoline
- Swallowed sharp objects (swallowed objects can also cause a blockage, which needs a vet)
- Is already vomiting, drowsy, weak, seizing, or collapsed
- Has trouble breathing
- Swallowed the item many hours ago
- Is a breed with a short nose, or has a condition affecting swallowing or the airway
- Is a very small puppy or has other medical conditions
This list is not complete, and that is why a professional should decide.
What to do if your dog ate something harmful
- Stay calm and remove access to whatever is left.
- Call your vet or an emergency clinic. If they are unavailable, call a poison helpline: ASPCA Animal Poison Control Center, (888) 426-4435, or Pet Poison Helpline, (855) 764-7661. Both are open 24 hours a day and may charge a fee, which can be well worth it.
- Have information ready: your dog’s weight and age, what was eaten, how much, when, the packaging, and any symptoms.
- Follow instructions exactly. If they tell you to come in, go at once.
- Do not give milk, oil, or home remedies unless a professional advises it.
For wider advice on dealing with a dog that is unwell, see our guide to caring for a sick dog.
My dog did not vomit after peroxide. Is that normal?
Some dogs do not vomit, and others vomit for a long time. Either way, do not give a second round. Call your vet or a poison helpline and tell them exactly what was given and when. Even if there are no symptoms, ask for advice, because swallowing peroxide can irritate the stomach, and the original problem has not been solved.
What can I use to clean a dog’s minor wound?
For a small, clean scrape, many vets suggest gently rinsing with plenty of clean lukewarm water or sterile saline, then keeping the area clean and watching it. Prevent licking, since saliva can irritate and delay healing. See a vet if the wound is deep, gaping, bleeding heavily, from a bite, near the eyes, joints, or belly, or if you see swelling, pus, a bad smell, or heat. Avoid applying human products without asking your vet.
Frequently asked questions
Is 3% hydrogen peroxide safe for dogs?
The strength is not the main issue. Even the common household strength can cause harm if used the wrong way, and any use for vomiting should be directed by a professional.
What can we give a dog to make it throw up?
Do not try to make a dog vomit at home on your own judgment. Call a vet or poison helpline, who can decide if vomiting is safe, and who may offer treatment at the clinic.
What if my dog is dehydrated after vomiting?
Vomiting can cause dehydration. Read about keeping a sick dog hydrated and contact your vet if your dog cannot keep fluids down.