Cough medicine.

The owner of this pharmacy walks in to find a guy leaning heavily against a wall. The owner asks his assistant "What's with that guy over there by the wall?"
The assistant goes "Well, he came in here this morning to get something for his cough. I couldn't find the cough syrup, so I gave him an entire bottle of laxative."
The pharmacist goes "You idiot! You can't treat a cough with a bottle of laxatives"
The assistant goes "Of course you can! Look at him; he's too afraid to cough!"

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Pain is inevitable...suffering is optional

HAHA thats quite funny ;D