No smoke, no fire: What the initial literature suggests regarding vapourized cannabis and respiratory risk

“Given current limitations in developing an inhalant alternative for delivering cannabis medication, smoked marijuana remains the most readily accessible form of cannabis among medicinal users…

Cannabis actually served as an asthma treatment in the 1800s and, perhaps, in ancient times…

Informed health care professionals may consider making recommendations to their medicinal cannabis patients for vapourization of the plant, particularly for those who want the rapid relief that oral administration fails to provide.

It is not our intention to encourage inappropriate use of the plant, but to increase safety for those who choose to use it.

Vapourization of cannabis is likely less harmful than smoking.

Preliminary findings do support the idea that vapourization is an improvement over smoking.”

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4456813/