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Cannabis Campaigners' Guide News Database result:
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US: Effects of cannabis may be reversible
Ananova Wednesday 17 Oct 2001 A new study suggests people who smoke cannabis don't suffer any long-term intellectual problems. A New York study has found only short-term effects because the brain recovers naturally within days of smoking. There has long been concern the drug can affect long-term brain function. But scientists at a Massachusetts hospital have tested three groups of people aged between 30 and 55. Some were current heavy users, some former heavy users and others had smoked no more than 50 times in their lives. Over the course of a month they analysed urine samples and gave the participants intellectual tests. The experiment found some current users' ability to complete the tests to the same standard as non-users was effected, but that passed within seven days of non-use. The research published in the Archives of General Psychiatry, concludes the drug's adverse effects on the brain appear to be reversible. It also suggests they only relate to recent cannabis exposure rather than cumulative use over a lifetime.
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