There are many toxic things a dog could ingest, from rat poison, to antifreeze, to chocolate. Knowing when and how to induce vomiting could save your dog's life.  Inducing vomiting is done to get the dog to throw up the poisons. 

As a note of caution you can always phone your veterinarian and get advice over the phone in regards with what to do in an emergency. In some cases you may try to induce vomiting and still need to get your dog to the veterinarian. Never try to induce vomiting without calling your veterinarian first.

Do Not Induce Vomiting If:

• You have not called your vet first!
• If the dog is already vomiting
• The dog has collapsed or is unconscious
• The dog has swallowed drain cleaner or bleach
• The dog swallowed something bad more than 2 hours ago, by this time digestion will have already started.

How to Induce Vomiting in a Dog

Hydrogen peroxide is considered to be a toxin because it makes dogs vomit, which is exactly why it is what you will use to induce vomiting in your dog. You will want to use 3% Hydrogen Peroxide and should keep some in your dog's first aid kit at all times.

Offer your dog a small amount of food, either some dog food, wet oatmeal, a slice of bread, or baby pablum. The idea is to put something into his, or her, stomach, to help make it easier to vomit.

Pour some 3 % Hydrogen Peroxide (available at a pharmacy) into a bowl or cup. You will need a syringe (without a needle on the end) and will have to draw up 3 cc of the hydrogen peroxide per 20 pounds of weight of your dog, or per 9 kg of weight. As such if your dog weighs 40 pounds (18 kg) you need 6 cc.

If you do not have a syringe, 1 teaspoon is 4.9cc, roughly enough for a 33 pound (14 kg) dog.  You can use a turkey baster or some other way to get this into the dog. 

Open your dog's mouth and put the syringe in as far to the back of the throat as you can. If you squirt too fast it might go into the lungs so use a steady pressure. It will help if somebody can hold the dog for you.

Note the time. Wait 10 minutes, if it has not vomited by then, repeat the process; you will not have to give any more food, just the hydrogen peroxide.

If your dog has not vomited within 5 minutes of the second dose, do not give a third dose, call your veterinarian immediately.

Remember - Never attempt to induce vomiting without calling your veterinarian first, and never after 2 hours.