"Based on the largest case controlled study ever done there was no evidence that marijuana increased the risk of lung cancer"
– Dr. Donald Tashkin, Emeritus Professor of Medicine, UCLA (USA, 2014)
There is credible evidence that smoking cannabis does not cause lung cancer, however smoking can irritate your sinus, throat
and lungs and is therefore not a recommended form of medicating with cannabis.
The practice of smoking cannabis mixed with tobacco holds all the dangers of using tobacco and is certainly not advised.
Conversely, vaporization of cannabis
using a vaporizer device such as those intended to be used by this study has been clinically proven to be a safe and effective, dose-titratable method of medication.
"Our results show that with the Volcano
a safe and effective cannabinoid delivery system seems to be available to patients. The final pulmonal uptake of THC is comparable to the smoking of cannabis, while avoiding the respiratory disadvantages of smoking."
Dr. Arno Hazekamp, et al, in the clinical trial report Evaluation of a vaporizing device (Volcano®) for the pulmonary administration of tetrahydrocannabinol (The Netherlands, 2006). At the time the Volcano
was the only really effective herbal vaporizer available.