Shoest acting synthetic opioid is
.Remifentanil is a potent, sho-acting synthetic opioid analgesic drug. It is given to patients during surgery to relieve pain and as an adjunct to an anaesthetic. Remifentanil is used for sedation as well as combined with other medications for use in general anesthesia Ref Robbins 9/e pg 345
Fentanyl
Remifentanil
Alfentanil
Sufentanil
All India exam