It's legal as use for treatment of asthma in Canada, and many states in the US although I can't find a link to a government list of what can be treated with it. Probably because the government doesn't want people looking at this list to find something they have that's treatable.
I found some unofficial sources, just citing newspapers or whatever, heres one:
I don't feel like looking all too hard. But essentially THC is a bronchial dilator; it opens up the pathways to the lungs allowing you to breathe much better, which is why I smoke before I run
Obviously It won't help you in an asthma attack, but for treating chronic asthma, it works great
here is a study
I found some unofficial sources, just citing newspapers or whatever, heres one:
I don't feel like looking all too hard. But essentially THC is a bronchial dilator; it opens up the pathways to the lungs allowing you to breathe much better, which is why I smoke before I run
Obviously It won't help you in an asthma attack, but for treating chronic asthma, it works great
here is a study
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