Bear in Bar

A bear walks into a bar and asks the bartender for a beer. The bartender says, Sorry, we dont give beer to bears in bars.
The bear replies, If you dont give me a beer, Ill eat that lady over there.

The bartender says, Go ahead.

So the bear eats the lady and asks for a beer. The bartender says, Sorry, we dont give beer to bears on drugs.

What do mean, says the bear. Im not on drugs.

Yes, you are, that was the barbituate.