== mechanism == 

 What happened to the mechanism section? "It works on the brain to make you happy!" is just ridiculous. It's an opioid, which have a ton of uses and "getting high" isn't a medically-accepted use last time I checked. Isn't "it hooks up to those opioid things in the brain!" a little simplistic? Was it always like this? I could have sworn it had a lot better wording. I know that the mechanism of opioids is widely reported on in Wikipedia, but if nothing else link to a more thorough explanation of the pharmacology (like in the morphine or diacetylmorphine articles) instead of tossing that rubbish at the reader.