New research from Johns Hopkins Medicine suggests that combining cannabis edibles with alcohol can impair driving more than using either substance alone. The study also found that standard field sobriety tests often failed to detect impairment caused by cannabis, whether it was consumed by itself or alongside alcohol.

The findings, published in JAMA Network , underscore growing concerns about the risks of mixing cannabis and alcohol. Researchers say the results point to a need for better public awareness and more effective ways to identify impaired drivers on the road.

The study also raises questions about current legal standards.…