Which states allow medical marijuana?
Medical marijuana is legal in 37 states and the District of Columbia:

Alaska
Alabama
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
District of Columbia
Florida
Hawaii
Illinois
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Missouri
Montana
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Dakota
Utah
Vermont
Virginia
Washington
West Virginia
States that allow restricted use only include: Georgia, Indiana, Iowa, Kansas, Kentucky, Mississippi, North Carolina,South Carolina, Tennessee, Texas, Wisconsin and Wyoming.

How do you get medical marijuana?
To get medical marijuana, you need a written recommendation from a licensed doctor in states where that is legal. (Not every doctor is willing to recommend medical marijuana for their patients.) You must have a condition that qualifies for medical marijuana use. Each state has its own list of qualifying conditions. Your state may also require you to get a medical marijuana ID card. Once you have that card, you can buy medical marijuana at a store called a dispensary.