Which statement best describes sufentanil metabolism and first-pass effects?

Which statement best describes sufentanil metabolism and first-pass effects?

• A. Significant hepatic metabolism with no pulmonary first-pass effect
• B. Metabolized by plasma esterases
• C. No hepatic metabolism
• D. Significant first-pass pulmonary effect and liver metabolism

Answer: (D)

Sufentanil’s pharmacokinetics are driven by its high lipophilicity, which leads to rapid uptake into the lungs after IV administration and a substantial pulmonary first-pass extraction. This pulmonary uptake momentarily siphons off drug from the circulating blood, helping deliver it quickly to the brain and contributing to a rapid onset of effect. After this initial distribution, sufentanil is primarily cleared by the liver through hepatic metabolism to inactive metabolites, with renal excretion of those metabolites. It is not broken down by plasma esterases, and there is indeed hepatic metabolism, so the statement describing significant pulmonary first-pass effect together with liver metabolism best fits sufentanil’s profile.

Sufentanil’s pharmacokinetics are driven by its high lipophilicity, which leads to rapid uptake into the lungs after IV administration and a substantial pulmonary first-pass extraction. This pulmonary uptake momentarily siphons off drug from the circulating blood, helping deliver it quickly to the brain and contributing to a rapid onset of effect. After this initial distribution, sufentanil is primarily cleared by the liver through hepatic metabolism to inactive metabolites, with renal excretion of those metabolites. It is not broken down by plasma esterases, and there is indeed hepatic metabolism, so the statement describing significant pulmonary first-pass effect together with liver metabolism best fits sufentanil’s profile.