An Effective Placebo!!!
The owner of a drug store walks in to find a guy leaning heavily against a wall.
The owner asks the clerk, " What's with that guy over there by the wall ?"
The clerk says,, " 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 says, " You idiot ! You can't treat a cough with laxatives !"
The clerk says, " Oh yeah ? Look at him, he's too afraid to cough !"