It Is New Year's Eve. My Dog Had A Seizure

It is New Year's Eve. My dog had a seizure and the vet has prescribed Diazepam, 2 tablets @ 10 mg. each. He can't walk straight now and behaves as though he is drunk. He's a large Black Labrador, weighing about 100 pounds. He has not had a seizure for over one year...and picks New Year's Eve when no one is available...everything is closed here in Cody Wyoming. Can you, will you help me? Cynthia Nielsen at YYYY@YYYY New Year and Thank you so much.