Too Good

I got this from Reader's Digest

A pharmacist enters his drug store to see a man leaning against the wall inside looking very stessed. He asks his clerk "What's up with him?"

"Him? Oh, he came in with a bad cough. We're out of cough remedy so I gave him a laxative."

"A laxative? How dare you give him a laxative? Laxatives don't cure a cough!!"

"I know, but now he's afraid to cough."