A Thunder Bay lawyer has a warning for people who may drive while on certain prescription drugs. Christopher Watkins says there are now tests available to detect whether a driver is on medication. Watkins says that could mean some innocent people could get in serious trouble. He says there may be a lot of citizens who have suffered injuries and could be driving while on pain medications like oxycodone or percocets. Watkin says they may not be aware they could be in danger of facing an impaired driving charge. Watkins says a conviction could result in the loss of a driver's licence.