Four ways to induce vomiting in dogs quickly include: inducing vomiting with soapy water, inducing vomiting with hydrogen peroxide, inducing vomiting with high-concentration salt water, and inducing vomiting in the hospital. If your dog is poisoned, you need to induce vomiting as soon as possible within two hours, otherwise the toxin will enter the intestines. It is best to take the dog to the hospital to induce vomiting or get an antidote injection. Moreover, inducing vomiting is only a temporary first aid method. If done improperly, it may be counterproductive. , so it is safer to go to the hospital for treatment by a doctor.