Hun the first thing I would do is call poison control, beleive it or not they can often help with animals too.

Secondly, dont let the dog eat or drink anything else just in case its not ok.

Heres what I was able to find:

Aspca Animal Poison Control Center Hotline
As the premier animal-oriented poison control center in North America, the ASPCA Animal Poison Control Center isyour best resource for any animal poison-related emergency, 24 hours a day, 365 days a year. Make the call that can make all the difference: (888) 426-4435. A $55 consultation fee may be applied to your credit card.

Other than that put in a call to your local vets office, see if they have an emergency service that can answer that question for you.