The results of a pilot study suggest those who take iomazenil before drinking brake more quickly and are less likely to stray into the wrong lane.

But the researchers, from Yale University in the U.S., do not want to develop a drug that simply allows people to drink more.

They hope that by stopping alcohol from getting to work on particular brain cells, iomazenil could help in developing a ‘stay sober’ pill to wean heavy drinkers off alcohol by taking some of the pleasure out of drinking.