Alive & Twitching

A pharmacist walks back into his shop 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 an entire bottle of laxatives” replies the assistant.

“You idiot” exclaims the pharmacist, “you can’t treat a cough with laxatives.”

“Of course you can” replies the assistant, “look at him. He’s too bloody scared to cough.”