Healthcare

One prominent shareholder is threatening a class action lawsuit and others are furious after a sale of the pharmaceuticals business to America's Cosette was blocked on national interest grounds.

Potential buyers are eyeing Mayne Pharma’s Adelaide factory at the centre of its takeover saga, giving investors hope the deal could still be salvaged.

The Treasurer's surprise preliminary decision to block the acquisition of Mayne Pharma has upended a saga that already stood to reshape the way deals are done in Australia.