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Systematic (IUPAC) name
CAS Number 101343-69-5
ATC code none
PubChem CID 60575
Synonyms Ocfentanil
Chemical data
Formula C22H27FN2O2
Molar mass 370.460 g/mol[[Script error: No such module "String".]]
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Ocfentanil (A-3217) is an opioid analgesic that is an analogue of fentanyl and was developed in the early 1990s. It is similar to fentanyl in effects, producing strong analgesia and sedation, but is slightly more potent, with 3μg/kg of ocfentanil being equivalent to 5μg/kg of fentanyl.[1]

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


  1. Fletcher JE, Sebel PS, Murphy MR, Mick SA, Fein S. Comparison of ocfentanil and fentanyl as supplements to general anesthesia. Anesthesia and Analgesia. 1991 Nov;73(5):622-6. PMID 1952145