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Systematic (IUPAC) name
Clinical data
Legal status
CAS number 79146-56-8
ATC code None
PubChem CID 6425761
ChemSpider 4931228 YesY
Synonyms β-Methylfentanyl
Chemical data
Formula C23H30N2O 
Mol. mass 350.497 g/mol
 YesY (what is this?)  (verify)

β-Methylfentanyl is an opioid analgesic that is an analogue of fentanyl.

β-Methylfentanyl was sold briefly on the black market in the early 1980s, before the introduction of the Federal Analog Act which for the first time attempted to control entire families of drugs based on their structural similarity rather than scheduling each drug individually as they appeared.[1]

β-Methylfentanyl has similar effects to fentanyl. Side effects of fentanyl analogues are similar to those of fentanyl itself, which include itching, nausea, and respiratory depression, which can be serious and even life-threatening.


  1. ^ Henderson GL (1988). "Designer Drugs: Past History and Future Prospects". Journal of Forensic Sciences 33 (2): 569–575. PMID 3286815.