A game-changing breast cancer drug is now available

Pharmac's funding trastuzumab deruxtecan , branded as Enhertu, from today - along with a lung cancer drug and two respiratory treatments.

Enhertu is expected to help 120 people with HER2-positive breast cancer in its first year of funding.

Breast Cancer Aotearoa Coalition Libby Burgess says the drug keeps the cancer stable for four times as long - allowing people to live longer.

She says many clinical trials have shown it's superior to everything else that's been tried for this form of breast cancer.