"Medicinal" marijuana is legal here in Colorado. I put medicinal in quotes because I would estimate that 90% of the people who have a medical marijuana card don't actually need it for medical reasons. The regulations around medical marijuana have tightened up recently, but several years ago it was not uncommon to see sign spinners all over less-than-savory districts of Denver advertising their dispensary (though not all communities have allowed dispensaries; we don't have any in the city I live in, for example).

One of the issues surrounding the legalization of medical marijuana is that it can impair some (but not all, some argue) drivers. The tests to gauge the drug content in the body are not as easily administered as alcohol-level tests (it requires a blood or urine test). If impairment levels vary so much between individuals, and are so hard to measure, how can you regulate this and make sure people on the road are safe?

In addition, marijuana has just as many cancer health risks as cigarettes. Personally, I think the risks outweigh any potential benefit to legalizing it. I think the real problem is sending someone to jail over this- our society jails way too many people (the most in the world).