Brifentanil

Brifentanil (A-3331) is an opioid analgesic that is an analogue of fentanyl and was developed in the early 1990s.

Brifentanil is most similar to highly potent, short-acting fentanyl analogues such as alfentanil. The effects of brifentanil are very similar to those of alfentanil, with strong but short lasting analgesia and sedation, and particularly notable itching and respiratory depression.