Police in Gwent say they have disqualified 135 drivers in the past year, for getting behind the wheel whilst on drugs.
It's thanks to a new roadside test which was introduced in May 2015.
The 'DrugWipe' uses a saliva sample to test for drugs like Cannabis and Cocaine.
It can reveal results within 8 minutes, and if positive, drivers will be taken to a police station for further tests.
Officers say the test will help bring more criminals to justice.
Drivers convicted of drug driving could face:
A minimum 1 year ban
An unlimited fine
Up to 6 months in prison
A criminal record
An increase in car insurance
A record on your licence