Cognitive performance and subjective effects the morning after last use of smoked cannabis by adults who use cannabis frequently: An observational study

Abstract Objectives: To examine next-day cognitive performance and subjective drug effects after smoking cannabis and to assess associations between performance and cannabinoid concentrations in blood and oral fluid. Methods: In this observational study, healthy adults who regularly used cannabis (mean age 30 years; n = 65) smoked a legally purchased pre-rolled “joint” at night and were tested the next day, 12–15 h later. Healthy adults with no past-month cannabis use served as a matched control group (mean age 30; n