The head of Cystic Fibrosis New Zealand is rejecting any suggestion that pharmaceutical companies have an influence on its campaigns to get drugs funded.

Health Minister Ayesha Verrall says different groups campaign for various drugs to be funded.

She says pharmaceutical companies can have influence, and we don't know what that influence is in terms of how those campaigns are run.

Chief Executive Lisa Burns told Tim Dower that stakeholder management is critical in a campaign, as you're trying to get the right information to the right decision-makers.

She says it would be unethical and inappropriate for a pharmaceutical company to have any influence over a campaign.

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