Over 2,000 people have been caught driving while under the influence of drugs, since the introduction of random drug testing in Victoria.

Victoria was the first place in the world to introduce random testing five-and-a-half years ago.

Since then, over 120,000 drivers have been tested and 2,000 people have been caught driving under the influence of drugs.

That is a rate of 1 in every 61 drivers.

Eighty-three per cent of those caught had been taking speed.

Cannabis and ecstasy were also detected.

Victoria Police have caught more than 300 people driving under the influence of drugs in the past six months alone.

Figures show 87 per cent of those caught are male and over one-third are under 26-years-old.

Inspector Martin Boorman says he believes people are not fully aware of the danger caused by drug drivers.

"I think most of the community understand that drink driving is dangerous. People have to understand that drugs driving is dangerous and people get hurt," he said.

"With drugs and driving, people don't look like they're falling down drunk or anything like that. The signs and effects can be quite subtle."