Non-consultant hospital doctors say they're prepared to strike if unsafe and illegal working hours aren't addressed.
97% of IMO members voted in favour of industrial action, up to and including strike action.
The union is seeking urgent talks as more and more junior doctors are opting to leave the country over long hours and toxic working environments.
The Irish Medical Organisation says strike action will be served if the Department of Health and the HSE aren't serious about resolving the issues.