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My dog has dry heaves after vomiting from hydrogen peroxide. How to help?

Updated On September 23rd, 2025

Pet's info: Dog | Greyhound | Male | neutered | 1 year and 6 months old | 20 lbs

Our dog ingested a 1/2 on. of grapes. We discovered this about 5 min. after & upon advice of our vet, gave him 2 T. of Hydrogen Peroxide. He vomited immediately & within 2x more, it appeared all of the grapes were out. Problem is he's continuing to have dry heaves almost 24 hrs. later. He doesnt seem to be bothered by them when asleep. What can I do for him to relieve the dry heaves? He's 2 yrs. old, 20 lb., good health, Min. Greyhound.

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2 Answers

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on June 12th, 2018

The peroxide can be very irritating to the esophagus and stomach lining. It is the main reason we do not recommend using it to induce vomiting. You can try withholding food for 12-24 hours, allowing small, frequent amounts of water or unflavored PediaLyte. Resume feeding a soft, bland diet in small, frequent amounts until symptoms resolve. Start with 1 tablespoon of food every hour and gradually increase the amount if there is no dry heaving or vomiting. Feed bland until symptoms resolve then transition slowly to Gene's regular diet. If the dry heaving persists, have him physically examined by your veterinarian.

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    Answered By Dr. Strydom, DVM

    Veterinarian

    Published on August 13th, 2018

    He will likely be fine. The only other thing to recommend is to give him some Pepcid (famotidine) 10mg once a day for a few days. Hydrogen peroxide is very irritating to the stomach lining and the Pepcid will help that. Otherwise treat him as normal. If he starts acting sick, you need to get him to your vet for an exam. ( https://www.petpoisonhelpline.com/poison/grapes/ )

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