A Pharmacist walks into his shop to find a customer leaning heavily against the wall. "What's wrong with that man?" he asks his assistant. "Well," the assistant replies. "He came in this morning to get something for his cough. I couldn't find the cough syrup so I gave him an entire bottle of laxative!"
"You can't treat a cough with laxatives!" splutters the pharmacist, "Yes, you can, Look at him... now he's afraid to cough!"