The Māori Pharmacists Association warns any changes to the Government's drug-buying body could increase the price of medicines.
As New Zealand and the United States hold talks on free trade, Pharmac is under pressure from American pharmaceutical companies that argue the agency is anti-competitive.
Māori Pharmacists Association president Leanne Tekaru says Pharmac needs to stay intact for the sake of patients.
She says given the potential for the medicines bill to escalate without Pharmac, the body is beneficial to everyone.
Ms Tekaru has written a letter of support to Pharmac for the agency to continue operating.
