Drivers will be warned about the potential effects of medicines in a new THINK! campaign launched by road safety minister Paul Clark today.

One million leaflets will be distributed while medicine bags will be labelled with stickers prompting drivers to check with their doctor or pharmacist that they are safe to drive while taking their medicines.

This follows a major TV, radio and online campaign in August 2009 to target the irresponsible minority who drive while under the influence of illegal drugs.

"We have already run a hard-hitting campaign to tackle those who drive after taking illegal drugs," said Paul Clark.

"But it is not just illegal drugs which can affect your driving.

"Some medicines may cause drowsiness and impair judgement, increasing the risk of an accident.

"That is why we are raising awareness of the potential effects of over-the-counter and prescription medicines on driving ability with this new campaign."

Paul Bennett, Boots superintendent pharmacist, said: "It is vital that anyone taking medicine follows the instructions properly and continues to take their course.

"However, people also need to take into account the potential effects their medicine may have on their ability to drive.

"Regulations already require that a warning is included in the patient information of every medicine which may have such an effect.

"However, we hope that providing additional information when people collect medicines will prompt them to find out more from their doctor or pharmacist."

For more information about the THINK! campaign please visit: www.dft.gov.uk/think/drugdrive.