The Pharmacist walks to the counter after a short break and sees a man leaning against the wall.
"What's wrong with him?" he asks his assistant
"He came in for cough syrup but I couldn't find any so I gave him some laxatives" replied the assistant.
"You bloody idiot" exclaims the chemist, "you can't treat a cough with laxatives"
"Of course you can" replies the assistant, "look at him, he's too scared to cough"