A pharmacist walked into his own shop to find a man leaning against the wall.
"What's wrong with him?", he asked his assistant.
"He came in for cough syrup, but I could not find any, so I gave him an entire box of laxatives."
"You idiot" said the chemist, "You cannot treat a cough with laxatives."
"Of course you can" the assistant replied, "Look at him.........he dare not cough now!!"  

 K.J.