Drug-buying agency Pharmac is to fund another treatment to help people quit smoking.
The smoking cessation treatment known as Champix will become available next week on prescription for adults.
The move is part of a multi-product agreement between Pharmac and the drug firm Pfizer.
Pharmac medical director Peter Moodie says Champix will be part of Medsafe's Intensive Medicines Monitoring programme, because of safety concerns.
Dr Moodie says anyone wanting to go on Champix should have first tried other simpler treatments, such as nicotine replacement therapy, Zyban, and nortriptyline.