USA: Study on Cannabis Withdrawal

Source: Budney AJ, et al. J Abnorm Psychol
2003 Aug;112(3):393-402

In a study at the University of Vermont, USA, the time course of withdrawal symptoms was analysed in 18 cannabis users. For 5 days they smoked as usual which was followed by a 45-day abstinence phase. Withdrawal symptoms, e.g. aggression, anxiety, decreased appetite, irritability, restlessness, and sleep problems, typically set in between days 1-3, peaked at days 2-6 and lasted 4-14 days.