I am a South African wildlife vet. I used to use Nalorphine hydrochloride extensively in chemical capture operations but have not been able to get it for some years now-any help as to availability ? Nalorphine is used to elevate the level of anaesthesia particularly during white rhino capture and can be used to walk rhinos,both black and white,as well as buffalo out of inaccessible areas in order to be loaded for relocation purposes. I am now using butorphanol but it has very variable effects.