A state government crackdown will allow police to charge drivers who have taken prescription and even some over-the-counter medications.

The definition of “drug” is being broadened to include all prescription medications in drug-driving laws.

The new measures target those dosed up on medication like codeine and cold and flu tablets.

Roads Minister Melinda Pavey tells Steve Price any substance can be a danger.

“What we’re doing now with this change is saying ‘it doesn’t have to be a listed drug anymore’.

“The word drug enables a drug that may have come onto the market, that isn’t listed, to be able to be used as a substance that has been abused.

Roadside drug tests will double to 200,000 tests a year by 2020 to catch drivers getting behind the wheel while affected by medication.

The government ordered a review after Home and Away actress Jessica Falkholt and her family were killed by a drug driver on Boxing Day.

Click PLAY below for the full interview