Anecdotally, many users report that it is less euphoric than heroin: > The subjective effects of fentanyl are similar to those of heroin, with the exception th

Anecdotally, many users report that it is less euphoric than heroin: > The subjective effects of fentanyl are similar to those of heroin, with the exception that many users report a noticeably less euphoric "high" https://psychonautwiki.org/wiki/Fentanyl https://psychonautwiki.org/wiki/Fentanyl (also of note is that heroin fentanyl has a shorter duration of action) >Ocfentanil shows typical opiate-like effects like euphoria and relaxation. Users reported that it is less “cool” and euphoric than heroin, but it is more stimulant and has a very quick onset, after 3 min. The users also reported that it has shorter duration of action (3 h) than heroin https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5754389/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5754389/ Whether or not that it is true, it may contribute to users not using it (obvious safety issues aside).