My German Shepherd -- who I'm convinced is one of the most stupid dogs on the planet (lovable though) -- decided to eat an entire bottle of aspirin one day. Luckily I arrived home less than an hour after he had eaten them. But about 5 minutes after the vet closed. Hurried him down to the Emergency Vet. They induced him to vomit eberything back up. When they'd gotten everything out, and counted the pills, he appeared to have eaten about 10x the lethal dose.
Anyway, the induced vomiting, the medicine to settle his stomach afterwards, plus observation overnight was a bit over $1000.
But he's a good dog, and my daughter's best friend and protector. So it was worth it.