Federal Health Minister Peter Dutton has told worried parents of children with cystic fibrosis that he hopes negotiations over the listing of new life-changing medicine will be resolved as soon as possible.

But he says he can't intervene to speed up the process which has dragged on since last year.

The Pharmaceutical Benefits Advisory Committee has recommended the drug Kalydeco be listed for government subsidy but has asked manufacturer Vertex to make it more cost-effective for the government.

Cystic fibrosis sufferers and their families on Wednesday travelled to Canberra to meet with Mr Dutton and call on the Abbott government to end the stand-off over the listing.

For more details, go to: http://news.smh.com.au/breaking-news-national/dutton-wont-intervene-in-cf-drug-listing-20140528-392px.html