Ca. clinic trials show medical benefits of pot

The results of five state-funded scientific clinical trials came 14 years after California voters passed a law approving marijuana for medical use and more than 10 years after the state Legislature passed a law that created the Center for Medicinal Cannabis Research at UC San Diego, which conducted the studies.

It was noted volunteers had the same amount of pain reduction with low doses of THC, the psychoactive ingredient in marijuana, compared with high doses of THC. He also said evidence casts doubt on long-term negative impacts of marijuana use, while acknowledging there have not been formal studies on the question.

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