Mixing Edible Cannabis and Alcohol May Impair Driving More Than Scientists Expected

A Johns Hopkins study found that cannabis edibles combined with alcohol caused greater simulated driving impairment than either substance alone.

Participants also reported stronger intoxication when the two substances were used together.

Standard field sobriety tests did not reliably detect the cannabis-related impairment.

The findings suggest a higher crash risk and a gap in current roadside testing for impaired drivers.