I'm sure that trials made it directly to human testing. "Legalization" has gained some ground on them and they're working hard to put it back in the bottle.

Pfizer is lobbying the Government of Canada via The Arthritis Society to do exactly that, using a paint by numbers approach per the language they've already agreed upon. "Because marihuana is not a real medicine per Health Canada... because our patients/community find it effective, but need safe methods, because doctors won't prescribe it without standardized dosing", etc.

So they're now in the game of manufacturing the clinical evidence they need in order to justify all of this simply by running a clinical trial on a fixed ratio of cannabinoids, chosen arbitrarily. They'll then call this ratio a new cannabinoid by itself, have it patented and rubber stamped approved. Genuine medical users will then be heavily restricted and told "this is the proven effective and safe drug, you can't use that deadly plant, it causes still developing brain and harms the children". But you'll have the option of buying it a single gram at a time for an absurd price + sin tax, at the liquor store, where they're all in the business of saving the children. Or you can have that nice, prescribed, subsidized product that melts your mind.

I see where they made a lame link to marijauna, but this was a painkiller they were testing. It's not like they failed at creating synthetic marijauna to have fun with your friends. Rather, they failed at creating a new kind of pain killer that works in a new way.

Weed never was going to keep serious pain away.