I don't mean to be rude or disregard what you're sharing, but it's Monday morning and my brain hasn't done anything except write code so far, so writing human words is a little hard right now. You qualify as a "childhood-recovered stutterer," which is different than most of the people in this subreddit. Of the ~5% of children who experience a phase of stuttering, ~80% recover and it doesn't affect them anymore. Pretty much everyone in this subreddit who labels themselves a stutterer fits into the 20% that didn't grow out of it. So your situation is a little different. Research has shown that Parkinson's disease can cause childhood-recovered stutters to reappear. It sounds like trazodone had the same effect for you. I'm happy you got off the medication. I'd take sleep difficulties over stuttering, haha. I'm not sure how this may affect you long-term. I'm not an expert in the Parksinson's-triggered relapses, and those are a little different anyway; Parkinson's is permanent and degenerative, whereas you were only this medication temporarily. I don't want to scare you, but I hope it continues to be less and less of an issue. If you're really curious, you could search "Parkinson's stuttering" on Google Scholar and maybe reach out to some of the authors about your situation, and see what they think.