Study finds pot use has doubled, but researchers more worried ...
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OTTAWA (CP) - The number of Canadians who say they have used cannabis or injectable drugs in the past year has doubled in a decade, according to a major new survey.
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A U.N. report showing Canadians use more marijuana than people in any other industrialized country is more evidence that the drug should be legalized, activists said on Tuesday.
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NEW YORK  - The odds that adolescents will  smoke, drink or use marijuana may have a lot to do with their  physical development, regardless of their school grade level or  how old they are, a new study shows.
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Some people claim the plant called Cannabis sativa, also sometimes called Cannabis indica, &quot;marijuana&quot; or just &quot;pot,&quot; has medicinal value.
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Smoking large amounts of cannabis for therapeutic reasons may increase rather than reduce pain, a US study suggests.
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Kids who enter puberty early are more likely to use and abuse tobacco, alcohol and marijuana than those who physically mature later, mostly because their window of opportunity for experimentation is wider.
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Babies whose moms smoked during pregnancy have twice the risk of developing colic than babies with non-smoking moms, studies suggest.
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New animal research suggest that cannabinoids, the chemicals responsible for achieving a &quot;high&quot; from using marijuana, may prevent the growth of blood vessels in cancerous brain tissue, the Glasgow Sunday Herald reported Aug. 15.
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Science & environment: Cannabis smokers are exposed to more toxic chemicals in each puff than those who smoke only tobacco, scientists have found
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Marijuana users have faster blood  flow in their brains, even after a month of not smoking, U.S.  researchers reported on Monday.
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Smoking rates have more than doubled in Russia since the collapse of the Soviet Union, researchers say.
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The odds that adolescents will smoke, drink or use marijuana may have a lot to do with their physical development, regardless of their school grade level or how old they are, a new study shows.
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VANCOUVER (CP) - A top American clinical researcher in the field of drug addiction warned Tuesday that decriminalizing marijuana could lead to increased abuse of the drug.
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Asthma rates among UK children have  quadrupled since the 1970s and more than doubled in the past  decade, according to a study published on Wednesday.
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Heavy cannabis use may raise the risk of chronic lung disease more than smoking, two studies suggest.
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Frequent cannabis use during adolescence and young adulthood raises the risk of psychotic symptoms later in life, research suggests.
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NEW YORK  - Previous reports have suggested that alcohol use helps cancers grow and now, new research offers a possible explanation for this phenomenon.