My dog once ate a whole packet of my mothers anti-depressants.
My mother and I took him to the vet immediately when we came home and found him chewing on what was left of the packet. The vet said that because of his body weight there was no immediate danger. He said that my dog might have diarrhea for a short while, or vomit a few times, or just be an extremely hyper/happy dog.
Thankfully, we got the hyper/happy dog result! It was like he was completely manic. He was running around the lawn in circles, literally jumping up and down on the grass and barking at his paw.
It wore off after a few hours and he just kind of "crashed". He went really quiet, lethargic and ignored both my mother and I when we called him. He didn't eat that night either.
It was like he was "Rapid Cycling". So we had a Bipolar dog for a day.
_________________
I = Vegan!
Animals = Friends.