First law that legalized medical marijuana
In 1978, the federal government was forced to allow some patients access to medical marijuana after a “medical necessity” defense was recognized in court, creating the Investigational New Drug (IND) compassionate access program.
Medical marijuana by states
Thirteen states have medical marijuana research laws, and only fifteen states have never had a positive medical marijuana law.
Since 1996, fifteen states have enacted laws that allow the cultivation of medical marijuana and protect patients who possess medical marijuana (with their doctors’ recommendations or certifications) from criminal penalties: Alaska, Arizona, California, Colorado, Hawaii, Maine, Michigan, Montana, Nevada, New Jersey, New Mexico, Oregon, Rhode Island, Vermont, and Washington. Ten of the thirteen did so through the initiative process. Hawaii’s law was enacted by the legislature and signed by the governor in 2000; Vermont’s was enacted by the legislature and passed into law without the governor’s signature in 2004; Rhode Island’s was passed into law over the governor’s veto in 2006; New Mexico’s legislation was signed into law by Governor Bill Richardson in 2007; and on January 18, 2010, Governor Jon Corzine signed New Jersey’s bill into law. In mid-December 2009, the United States Senate passed an omnibus appropriations bill that removed restrictions on the implementation of a marijuana initiative passed by District of Columbia voters in 1998; President Obama subsequently signed this bill into law on December 13, 2009.
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It’s absolutely legal to use marijuana for medical purposes in these states:
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