From: Butorphanol with oxygen insufflation corrects etorphine-induced hypoxaemia in chemically immobilized white rhinoceros (Ceratotherium simum)
Weight (kg)
Etorphine (mg)
Azaperone (mg)
Butorphanol (mg)
Naltrexone (mg)
500-750
1.5
22.5
30
750-1000
2.0
30.0
40
1000-1250
2.5
37.5
50
1250-1500
3.0
45.0
60
1500-1750
3.5
52.5
70
1750-2000
4.0
60.0
80