3개월 넘는건 원칙적으로는 안되고 메드세이프에서 허가 받아야해요. 운좋으면 그냥 세관에서 넘어갈수도 있구요.
Prescription medicines
If you are arriving into New Zealand with prescription medicines (other than medicines containing controlled drugs), on you or in your luggage you must:
have a copy of the prescription from your doctor, or a letter from your doctor stating that you are being treated with the medicine(s), and carry the medicine(s) in their original containers, and
have a quantity not exceeding three months’ supply for prescription medicines, If you are carrying more than three months’ supply of prescription medicines or medicine that is not prescribed to you or a family member, this must be declared on your arrival declaration.

노령의 저의 어머니가 사개월치 들고 오셧는데 인타뷰룸에 들어가셧엇어요.
영문처방전과 영문 의사소견서 및 진단서 다 들고 계셧구요.
영어가 안 되셔서 저나 통역하셧어요.