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My dog was bit by a spider, vomiting & diarrhea. Is Benadryl enough?

Updated On September 23rd, 2025

Pet's info: Dog | Siberian Husky | Male | neutered | 3 years and 8 months old | 85 lbs

I think my dog got bit by a spider last night his face is itchy and has been vomiting and having diarrhea and was very restless last night. He hates going to the vet I gave him some benadryl and the swelling did go down after but should I be more concerned?

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1 Answer

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Answered By Dr. Elizabeth

Veterinarian

Published on October 22nd, 2019

Poor Diesel! Benedryl may not be enough since he is showing more severe symptoms. It's also possible the vomiting and diarrhea is unrelated to a spider bite but that's hard to say without an exam. Sometimes these pets will need steroids in addition to an antihistamine. I recommend to call your veterinarian. They may want to have Diesel examined by the veterinarian who can provide appropriate medication for an allergic reaction and also for the vomiting and diarrhea. They may also instruct you further about antihistamines (pharmacy law prohibits online veterinarians from discussing human medication usage in pets). It's best to play it safe. I hope this helps and that he starts to feel better soon! Please feel free to post any additional questions.

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