Sufentanil is a synthetic opioid very similar to fentanyl, but with more rapid onset and shorter duration of action.[1] It can be used as an alternative to alfentanil if the fentanyl dose necessitates too large a volume for the portable syringe driver in use. It has also been used sublingually.[2] The clinically derived sufentanil to fentanyl relative potency is approximately 20:1[3]


