The owner of a drugstore walks in to find a guy leaning heavily against a wall with an odd look on his face.

The owner asks the clerk, "What's with that guy over there by the wall?"

The clerk says, "Well, he came in here at 7 A.M. to get something for his cough. I couldn't find the cough syrup, so I gave him an entire bottle of laxatives."

The owner says, "You idiot! You can't treat a cough with laxatives!"

The clerk says, "Oh yeah? Look at him-he's afraid to cough!"