I could care less about American Hefeweizen. Make a seperate article, this is about Hefe in general. I'd like to add Granville Island Breweries to the list, but lo and behold, it's a list of American brands, and GIB is Canadian. Go figure.
The standard dosage for oral Benadryl is 1 mg per pound of body weight, given 2-3 times a day. Most drug store diphenhydramine tablets are 25 mg, which is the size used for a 25 pound dog. Always double check the dosage before giving an over the counter medication. In addition, many formulations are combined with other medications such as Tylenol so make sure Benadryl tablets contain only diphenhydramine.
Dogs metabolize drugs different than humans for the most part and can handle large amounts of some and then not be able to tolerate some of our most favorite. Benadryl is part of the handles pretty well group. The general rule of thumb for dogs 1 to 2 mg per pound 3 times a day. Adult capsules/tablets (make sure it is plain Benadryl) come in 25 mg strength. This means he can have from 4-8 tablets every 8 hours.