<prompt> Characteristics of Remifentanyl a Metabolised by plasma esteraseb Short half lifec More potent than Alfentanyld Dose reduced in hepatic and renal diseasee Duration of action more than Alfentanylabbcabcbcd  <response>: Remifentanil is the shortest acting opioid due to its metabolism by plasma esterase dose adjustment is not needed in liver or kidney disease. It is more potent than alfentanil : Order of potency is Sufentanil Fentanyl Remifentanil Alfentanil. 