RIVM report 267002002/2006 A double-blind, randomized, placebo- controlled, cross-over study on the pharmacokinetics and effects of cannabis Tj.T. Mensinga, I. de Vries, M. Kruidenier, C.C. Hunault, I.S. van den Hengel-Koot, J.W. Fijen, M.E.C. Leenders, J. Meulenbelt This investigation has been performed by order and for the account of the Ministry of Health, Welfare, and Sport of the Netherlands, within the framework of project V/267002, A double- blind, randomized, placebo-controlled, cross-over study on the pharmacokinetics and effects of cannabis. RIVM, P.O. Box 1, 3720 BA Bilthoven, telephone: 31 - 30 - 274 91 11; telefax: 31 - 30 - 274 29 71 Contact: Tj.T. Mensinga Nationaal Vergiftigingen Informatie Centrum Tjeert.Mensinga@rivm.nl