From the L.A. Times:

Trustees of the California Medical Assn., which represents more than 35,000 physicians statewide, adopted the position at their annual meeting in Anaheim late Friday. It is the first major medical association in the nation to urge legalization of the drug, according to a group spokeswoman, who said the larger membership was notified Saturday.

Dr. Donald Lyman, the Sacramento physician who wrote the group's new policy, attributed the shift to growing frustration over California's medical marijuana law, which permits cannabis use with a doctor's recommendation. That, he said, has created an untenable situation for physicians: deciding whether to give patients a substance that is illegal under federal law.

"It's an uncomfortable position for doctors," he said. "It is an open question whether cannabis is useful or not. That question can only be answered once it is legalized and more research is done. Then, and only then, can we know what it is useful for."

The CMA's new stance appears to have as much to do with politics as science. The group has rejected one of the main arguments of medical marijuana advocates, declaring that the substance has few proven health benefits and comparing it to a "folk remedy."

The group acknowledges some health risk associated with marijuana use and proposes that it be regulated along the lines of alcohol and tobacco. But it says the consequences of criminalization outweigh the hazards.

Lyman says current laws have "proven to be a failed public health policy." He cited increased prison costs, the effect on families when marijuana users are imprisoned and racial inequalities in drug-sentencing cases.