Yes, Aleister Crowley was a known heroin user and struggled with addiction to the drug, which he documented extensively in his writings and through his personal experimentation with various substances. He explored the mind-altering effects of drugs, including heroin, and detailed his experiences with addiction and its psychological and physical impacts on the body and mind in works such as The Diary of a Drug Fiend.
I learned synth lead from an Ozzy fan:
https://www.youtube.com/watch?v=G3LvhdFEOqs