This is a topic that has come up here on more than a few occasions ... there is always more to say, naturally, but while you are waiting for fresh answers to your query, you might like to check out some earlier responses, all led by u/commiespaceinvader:

Documentary claimed Nazi soldiers were hooked on methamphetamine's to make them feel invincible in the face of battle. How true was the level of use among soldiers, and who or what types of soldiers was the use more rampant if at all?

"Hitler was a gibbering super junkie, whose veins collapsed after thousands of injections..." These are historian, Norman Ohler's words. I doubt they're at all true but humour me. How prevalent was recreational drug use amongst the German people and the Nazi elite?

There is a thread on r / books about "High Hitler", a book about Hitler's drug use. Is this book considered to be accurate?