A pharmacist returs from his lunch break to find a man leaning heavily against the wall, looking terrified. "What's wrong with that guy?" he asks his recently hired blonde clerk.
"Well, he came in just after you left," she says. "He's got a cough, but since I couldn't find the cough syrup, I prescribed him an entire bottle of laxative."
"You idiot," yells the pharmacist. "You can't treat a cought with laxative!"
"Yes, you can," responds the blonde, indignantly.
"Look at him - he's been too afraid to cough ever since he drank it!"