It comes after The Standard repeatedly highlighted magistrates' frustrations that laws prevented them from jailing drivers who failed oral drug tests.

Warrnambool magistrate Jon Klesdadt has been most vocal, bemoaning his inability late last year to jail a man who was caught drug driving seven times in six months.

Fellow Warrnambool magistrate Franz Holzer expressed his frustration while sentencing a drug-driving offender last week.

"There's a gap in the legislative regime where drug drivers don't have the same consequences as drink drivers and I really hope that situation changes," he said.

Premier Andrews on Tuesday told parliament during question time that work to change the penalties was "being done by a number of different agencies".

"Cabinet will soon consider a raft of other reforms and changes that will address the issues ... and we will have further announcements to make in due course," he said.

South West Coast MP and opposition rural roads spokeswoman Roma Britnell said drug-driving was a "massive issue".

"Right now the penalties are weak and are not sending a message to the community that this is something that will not be tolerated," she said. "It's taken a while and we've had to drag him kicking and screaming, but it now seems the Premier is on the same page."

Opposition leader Michael O'Brien announced that the Liberal Nationals would bring drug driving penalties into line with those applicable for drink driving.

Fifty-nine more Victorians have lost their lives on the state's roads compared to last year, but drug drivers are also now more prevalent in road deaths than drink drivers.

"Too many lives have been lost. Daniel Andrews must act urgently on calls from the Victorian judiciary to increase the penalties," Mr O'Brien said.