afe66: I remain skeptical that a nz Dr will put their name on the line to legalize importation of a medicine sourced from overseas by giving the OP a prescription.
By writing the prescription they are opening themselves up to criticism as to why they didn't prescribe the nz registered version.
Why doesn't the OP want to see his/her normal doctor to discuss this in an appropriate manner.
A.
Every prescription written in NZ allows brand swap out unless the doc says otherwise on the script. A script for circadin will allow you to bring in amounts upto the amount listed on the script (i.e 2mg once a night for 14 days means you can only bring in 14 pills of 2mg or 28 pills of 1mg)
As to why you would do this? Circadin is around $3-4 a pill in NZ. If you got a script for 3 months supply you could save a couple of hundred dollars