Anaes · Anaesthetic adjuncts
Sufentanil
Also known as Most potent fentanyl-family opioid · High-dose cardiac-anaesthesia opioid
Sufentanil has exceptionally high mu-receptor affinity with potency 10-fold fentanyl and 1000-fold morphine, therapeutic index nearly two orders wider than fentanyl, CYP3A4 biotransformation to completely inactive metabolites preventing accumulation in acute kidney injury, cerebral hemodynamic stability and reduced ventilation/extubation/ICU stay in cardiac surgery registries (Gomez narrative review). PK/PD simulations show longer distribution/elimination half-lives than alfentanil but faster recovery for operations shorter than 6-8 hours (Shafer); context-sensitive half-time is 50-percent decline after given infusion duration (Hughes); remifentanil esterases give flat 3.2 minutes even after 8 hours (Beers); rapid onset with high potency and cardiovascular stability trial-observed (Weninger); NICU observed ratios 20:1 morphine/fentanyl, 100:1 morphine/sufentanil, 4:1 fentanyl/sufentanil (Tauzin). Taught lipid/Vd/onset-minute/histamine/rigidity/naloxone points — confirm local formulary and protocol.
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Red flags
- Sufentanil is 5 to 10 times more potent than fentanyl — small volumes can produce profound respiratory depression; precise dosing is essential.
- Like fentanyl, sufentanil accumulates with prolonged infusion (rising context-sensitive half-time) — only remifentanil has a flat CSHT.
- High-dose sufentanil can cause chest-wall rigidity and bradycardia — reverse respiratory depression with naloxone.
Meet the patient
A 62-year-old man with severe aortic stenosis and a failing ventricle is scheduled for AVR. The cardiac anaesthetist reaches for sufentanil — potent analgesia with cerebral hemodynamic stability and reduced ventilation/extubation/ICU stay in cardiac surgery registries (Gomez). The trade-off: extreme potency means small volumes carry big effects, and accumulation means wake-up slower than fentanyl after long case — longer half-lives than alfentanil but faster recovery for operations shorter than 6 to 8 hours on simulation (Shafer).[1][2]
Sufentanil answers one question for high-dose opioid anaesthesia: which opioid gives the most profound analgesia and stress-response ablation with the most haemodynamic stability? High potency with cardiovascular stability trial-observed in 62-patient ESWL comparison (Weninger).[5]
References6ShowHide
- [1]Gomez JM, et al. Sufentanil in Intensive Care: A Narrative Review. J Clin Med, 2026.PMID 42513597
- [2]Shafer SL, et al. Pharmacokinetics, pharmacodynamics, and rational opioid selection. Anesthesiology, 1991.PMID 1824743
- [3]Hughes MA, et al. Context-sensitive half-time in multicompartment pharmacokinetic models for intravenous anesthetic drugs. Anesthesiology, 1992.PMID 1539843
- [4]Beers R, et al. Remifentanil update: clinical science and utility. CNS Drugs, 2004.PMID 15581380
- [5]Weninger E, et al. [A comparative study of intravenous opioid analgesia. Sufentanil and alfentanil for extracorporeal shock-wave lithotripsy in urologic patients]. Anaesthesist, 1996.PMID 8702050
- [6]Tauzin M, et al. Estimated equipotent conversion ratios of morphine, sufentanil and fentanyl as continuous infusion in neonatal intensive care units: a pharmacoepidemiologic cohort study. Eur J Clin Pharmacol, 2025.PMID 39729106