I'm reading A Drop of the Hard Stuff by Lawrence Block and it is a fine story about a recovering alcoholic private eye, Matt. Matt and another character have just dumped a bourbon soaked mattress out of a hotel window and are discussing the event:
"That dude at the desk. Jacob? He was pretty cool about the whole thing. He high on something?"I howled.
"He has a fondness for cough syrup," I said.
"Well, shit," Mark said. "Who doesn't?"
Update April 2016 added Amazon link.