More mind-over-matter strangeness

A bit of a follow-up to my item from a couple days about the power of suggestion reversing the intended effect of muscle relaxants.

Every drug out there in the world, every single one, even the ones that you see on TV, are, in a sense, inside our heads. The only reason those drugs work is because our brain has receptors for them. And why would it have those receptors? Because it can already make them in house. Every pharmacological agent that there is, there is a chemical produced by your own brain that essentially does that thing. It’s like an internal pharmacy in there, just stocked full of drugs …