If you are a health professional in NZ and are still using MIMS as your drug reference then you should probably be sodomised. Ok, a bit over the top but all jokes aside, NZ finally has its own version of BNF.
Not only does it have clinical information, it also provides PHARMAC and Medsafe info as well. For all the relevant links, see the New Zealand Formulary tab near the top of this page.
When you are using it on your computer (ie PDF version), don't be a chump and scroll through the pages when you are only trying to find information about one particular drug. Press Ctrl + F and type in the drug name and cycle through the relevant bits quickly. Unfortunately I don't think e-readers have that option.