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 Pet Doc Your Own Question
Pet Doc
Pet Doc, Dog Veterinarian
Category: Dog Veterinary
Satisfied Customers: 6523
Experience:  Veterinarian - BVSc
Type Your Dog Veterinary Question Here...
Pet Doc is online now
A new question is answered every 9 seconds

How much Benadryl is safe to give to a 100lb Saint Bernard

This answer was rated:

How much Benadryl is safe to give to a 100lb Saint Bernard?
Hi there,

Thanks for your question regarding your St Bernard girl Madison and a Benadryl dosage for her. It sounds like she could possibly have a food allergy - particularly if she seems to respond well when on the duck and potato food. You could even ask your Vet for the Hill's prescription diet Z/D ultra allergen free to use as a diet trial to see if her symptoms improve even more on this!

As for the benadryl, there is a pretty wide dose range. I don't think you should really venture much further past 1mg per pound for your girl every 8 hours though as giving 1.5 - 2mg per pound can cause mild sedation. So, for her weight she can safely have 4 x 25mg Benadryl pills THREE times daily (8 hours between pilling - ie: 7am, 3pm and 11pm). Try this and see if her symptoms lessen even more.

I hope this helps and let me know how you get on.

Thanks and please now click ACCEPT.

Kind Regards,

Dr M D Edwards
Pet Doc and other Dog Veterinary Specialists are ready to help you