observations were made for 3 h in 10 anaesthetized dogs on the effects of alfentanil 500 micrograms kg-1 and fentanyl 100 micrograms kg-1 on resting heart rate ( hr ) and mean arterial pressure ( map ) , and on the changes evoked in heart rate and mean arterial pressure ( delta hr and delta map ) by stimulation of a cutaneous nerve .
C0002026
alfentanil
C0015846
fentanyl