Changes

===Butorphanol===

===Butorphanol===

Butorphanol may be used to combat mild pain. It is a poor analgesic but has excellent sedative properties, and also acts as a cough suppressant. Butorphanol is licensed for veterinary use, and is a mixed partial agonist.

Butorphanol may be used to combat mild pain. It is a poor analgesic but has excellent sedative properties, and also acts as a cough suppressant. Butorphanol is licensed for veterinary use, and is a mixed partial agonist; it is an antagnoist at the OP3 receptor and an agonist at the OP2 receptor.

There is an onset time of 15 mins following i/v, i/m or s/c administration, and effects then last for 2-4 hours.

There is an onset time of 15 mins following i/v, i/m or s/c administration, and effects then last for 2-4 hours.