Cannabis Use Before Bedtime Does Not Cause Next-Day Impairment Of Cognitive Ability Image Cannabis News May 30, 2024 Marijuana Use Before Sleep Shows Minimal Impact on Next-Day Performance, Study Finds. A new study suggests that using marijuana before sleep has minimal if any effect on a range of performance measures the next day. These include simulated driving, cognitive and psychomotor function tasks Recreational Marijuana News The Wetumpka Herald