Prime Minister Tony Abbott has promised that any taxpayer-funded advertising campaign to promote his new GP co-payment plan will be "fair" and "frugal".

Speaking to reporters at the Royal Children's Hospital in Melbourne on Wednesday, Mr Abbott said he would not rule out an "information campaign" to explain the changes.

Prime Minister Tony Abbott and Health Minister Peter Dutton address the GP co-payment proposal on Wednesday. Credit:Alex Ellinghausen

"I think it is important given the misinformation which tends to get into the public arena, that correct information be given to the public," he said.