Don't cough

Outside a chemist in a busy street, a poor man is clutching onto a
pole for dear life, not breathing, not moving, not twitching a muscle,
just standing there, frozen. The pharmacist, seeing this strange sight in front of his shop, goes up to his assistant and asks, "What's the matter with that guy? Wasn't he in here earlier?" Assistant replies, "Yes he was. He had the most terrible cough and none of my prescriptions seemed to help." Pharmacist says, "He seems to be fine now." Assistant replies, "Sure, he does. I gave him a box of the strongest laxatives on the market... Now he won't dare cough!"