How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dr Scott Nimmo Your Own Question
Dr Scott Nimmo
Dr Scott Nimmo, Small Animal Veterinarian.
Category: Dog
Satisfied Customers: 20734
Experience:  BVMS, MRCVS. { Glasgow UK }
Type Your Dog Question Here...
Dr Scott Nimmo is online now
A new question is answered every 9 seconds

My yorkie - 8 lbs. ate 25 mg. benedryl. I gave her hydrogen

This answer was rated:

My yorkie - 8 lbs. ate 25 mg. benedryl. I gave her hydrogen peroxide - 4 oz. twice and she hasn't thrown up. What should I do? Will the benedryl hurt her? If she doesn't throw up the hydrogen peroxide, will that hurt her? It's been about an hour now.

Hello and welcome.

This is not an information request but just a short message to introduce myself.

My name is XXXXX XXXXX I am an experienced small animal veterinary surgeon, I will be very pleased to work with you today and will try my best to answer your question to your satisfaction.

Please give me five minutes or so to think through your particular problem, prepare an answer, and then type things up. I will then get back to you and we can then talk things over.



Customer: replied 4 years ago.

I also walked my dog around after giving her the hydrogen peroxide. She seems fine. But she hasn't vomited. I frequently give her 1/2 benedryl for allergies, and she does fine. She got the whole benedryl I dropped tonight, though.

Hello again Kathy and thanks for waiting.

I have worked out an answer for you, please read it through and see what you think ...

1. If you have given hydrogen peroxide twice then it is not recommended to do so further, she may still vomit though.

2. Even if she does not vomit then the chances are that Roxy should be fine as Benadryl is a drug with a high margin of safety in the dog. The dose rate Benadryl in the dog is between 1 - 2 mg per pound of your dog's body weight every 12 hours so 25mg is a slight overdose of course, but that should cause some sedation and little else. Roxy should be fine after a few hours but will sleep very soundly.

3. Of course you should keep a good eye on her and contact your vet if you become further concerned but this would be unlikely.

I hope I have covered your question fully enough but if you would like further clarification or to talk things over a bit more then I will be on-line for the next hour or so and I will be more than pleased to continue working with you.


Customer: replied 4 years ago.

So the hydrogen peroxide won't hurt her if she doesn't throw it up??

Hello again Kathy,

Glad to talk this over with you further ...

At this dose rate all you should see is some degree of mild sedation and then she should return to normal. But the 25 mg is higher than the dose rate we normally use so keep a good eye on her.


Dr Scott Nimmo and other Dog Specialists are ready to help you
Hi Kathy,

I'm just following up on our conversation about Roxy. How is everything going?

Scott Nimmo