Has there actually been any hard evidence to support this idea? I know there's a fair bit to support Hitler being basically a junkie by the end of the war, but pre-war I'm pretty sure he was just a meglomaniacal psychopath.

Hitler was also talking cocaine eye drops, his personal physician was batshit insane. A good match of course as Hitler himself was too.

Of course no law would have prevented this because the Nazis made the law in Germany.