'Very concerning': Young people warned mixing cocaine and alcohol can be fatal

Study found 38% of 20-year-olds smoked tobacco, almost a quarter used cannabis, 23% had used cocaine in the previous year, 18% ecstasy, and 12% had taken ketamine.

Young people are being warned about the potentially deadly effects of mixing cocaine and alcohol after a new study found almost a quarter of 20-year-olds are taking multiple substances.

The phenomenon of drug users mixing several different substances has swept the US in recent years, where health officials have warned the shift is making treatment more difficult.