title: Accumulation of alfentanil.
mesh_terms: D000328:Adult; D000368:Aged; D015760:Alfentanil; D000701:Analgesics, Opioid / Q000378:metabolism*; D000771:Anesthesia, Intravenous; D005260:Female; D005283:Fentanyl / Q000031:analogs & derivatives* / Q000378:metabolism; D006801:Humans; D008297:Male; D008875:Middle Aged; D011013:Pneumonectomy
chemical_list: D000701:Analgesics, Opioid; D015760:Alfentanil; D005283:Fentanyl