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Pubdate: Tue, 22 Mar 2005 Source: Press, The (New Zealand) Copyright: 2005 The Christchurch Press Company Ltd. Contact: http://www.press.co.nz/ Details: http://www.mapinc.org/media/349 Author: Louise Bleakley Related: How Science Is Skewed to Fuel Fears of Marijuana http://www.mapinc.org/drugnews/v05/n474/a07.html Bookmark: http://www.mapinc.org/pot.htm (Cannabis) NZ STUDY USED IN UK DRUG REVIEW A Christchurch study linking cannabis use with increased paranoia has contributed to a British decision to review its drug laws. British Home Secretary Charles Clarke last weekend ordered a review into a decision to downgrade cannabis from a class B to a class C drug, citing research by the University of Otago Christchurch School of Medicine and Health Sciences and a Dutch study, both of which found links between heavy cannabis use and psychosis. The downgrade in January last year meant possession was no longer an arrestable offence. The lead researcher in the Christchurch study, Professor David Fergusson, said the role of cannabis in psychosis was not sufficient on its own to guide legislation. "The result suggests heavy use can result in adverse side-effects," he said. "That can occur with (heavy use of) any substance. It can occur with milk." Fergusson's research, released this month, concluded that heavy cannabis smokers were 1.5 times more likely to suffer symptoms of psychosis that non-users. The study was the latest in several reports based on a cohort of about 1000 people born in Christchurch over a four-month period in 1977. An effective way to deal with cannabis use would be to incrementally reduce penalties and carefully evaluate its impact, Fergusson said. "Reduce the penalty, like a parking fine. You could then monitor (the impact) after five or six years. If it did not change, you might want to take another step." Associate Health Minister Jim Anderton said even incremental decriminalisation of cannabis would give people the wrong message. "Once the genie is out of the bottle it's very hard to put it back." Green Party spokesman for drug law reform Nandor Tanczos said he doubted the recent studies were the sole reason for the review. "People in the UK say the main reason they reclassified cannabis was (because of) law-and-order problems," he said. - --- MAP posted-by: Jay Bergstrom