Victorian paramedics will stop taking billing information from patients and undertaking hospital tasks as they launch industrial action following a dispute that has lasted more than a year.

Victoria's professional firefighters union has entered its fifth day of protected industrial action, as it pushes for improvements to firefighter and community safety from the state government.

Victorian paramedics will stop taking billing information from patients and undertaking hospital tasks as they launch industrial action following a dispute that has lasted more than a year.