OP already stated they don't know what kind of steroids were used. It's an anecdote and third-hand information, at best. Maybe OP misremembered something. Mayb

OP already stated they don't know what kind of steroids were used. It's an anecdote and third-hand information, at best. Maybe OP misremembered something. Maybe the doctor was wrong or simply trying to convince the guy to stop using steroids. Maybe the guy lied about what really happened to protect their medical privacy. None of us is in any position to determine what really happened. Facts as I understand them: OP chose to not use steroids themselves because of scary story from person they knew. Everything else is damn near wild conjecture as to "what really happened."