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My dog is lethargic after chocolate and peroxide. Should I worry?

Updated On September 23rd, 2025

Pet's info: Dog | Belgian Malinois | Male | neutered | 60 lbs

60 lbs dog ingested ~80-100 grams dark chocolate chips, induced vomiting within 30 minutes with 3% hydrogen peroxide (took 2 attempts, ~60 ml total). No vomit or diarrhea, normal feces/urine, eating and drinking normally, normal gums. 2 days later still slightly lethargic (i.e. less interest in playing, less excitement when asked to eat but normal appetite when presented with food, still engaged, wanting to go for walks, etc). Should I worry? How to best help?

1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on January 28th, 2020

You probably caused irritation of his stomach lining by giving him all that peroxide. Peroxide is very irritating to the stomach lining. I suggest you get him some Pepcid (famotidine) 10mg and give him one tablet by mouth twice a day for about 3 days and feed him a bland, easily digestible diet. Hopefully that will help. In the future, if he ingests chocolate you can use this toxicity calculator to see if he ingested a toxic amount. According to this calculator he did not ingest a toxic amount so inducing vomiting was probably not necessary. ( https://www.petmd.com/dog/chocolate-toxicity ) ( https://www.walmart.com/ip/Equate-Original-Strength-Famotidine-Tablets-10-mg-Acid-Reducer-for-Heartburn-Relief-90-Count/10325061 )

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