There is a subreddit called /r/MuseumOfReddit that is "dedicated to cataloguing the posts and comments that will go down in reddit history."

One of the more chilling posts on there[1] is the account of a user who randomly tried Heroin one day, got addicted within 2 weeks, overdosed and was clinically dead within a month, got revived and admitted, came clean, then posted an update to his story 7 years later.

I would personally suggest trying meditation first before trying opioids to alter consciousness and feel euphoric.

[1] https://www.reddit.com/r/MuseumOfReddit/comments/68srty/spon...