Is marijuana really an effective drug? Surprisingly, scientists have no solid answer

One would think that with medical marijuana now legal in 23 states, the science to support its efficacy would be fairly definitive. Surprisingly, that's not the case.

Despite the fierce political tussles and competing medical claims the truth is this: Very little solid scientific evidence exists to either confirm or dispute marijuana’s effectiveness as a drug or its potential for harm.

Marijuana is still classified by the US federal government as a Schedule I controlled substance (meaning it has “no currently acceptable medical use”), so serious research into marijuana is extremely difficult, especially FDA-approved clinical trials that would either prove or disprove marijuana's health benefits. 

States that have approved marijuana for medical use have done so through a legislative process, not a scientific one, researchers say. And that’s a real problem, both for scientists trying to determine marijuana’s effects and for people seeking cannabis to treat chronic medical

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URL: 
http://www.pri.org/stories/2015-07-19/marijuana-really-effective-drug-surprisingly-scientists-have-no-solid-answer