the incidence of postoperative respiratory depression was greatest in patients given morphine ( mean dose of naloxone 8.6 micrograms/kg ) and least with sufentanil ( mean dose of naloxone 1.8 micrograms/kg ) and fentanyl ( 3.2 micrograms/kg naloxone ) .
C0143993
sufentanil
C0015846
fentanyl