The owner of this drug store walks in to
find a guy leaning heavily against a wall.

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

The new clerk responds: "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 owner, wide-eyed and excited shouts:

"You idiot! You can't treat a cough with a bottle of laxatives!"

The new clerk calmly responds: "Of course you can!,
Look at him, he's afraid to cough."