Labour leader Andrew Little says his party will campaign on funding pembrolizumab up until the next election if the Government opts not to.
"It's used in other countries, we know that it's effective," he says.
"We would fund the drug. Once Pharmac made its decision it wasn't going to, I would've immediately put words in motion to say we would find a way to fund it and make it available as soon as possible to New Zealanders."
Watch the video for the full interview with Andrew Little.