Are there long-term consequences to smoking marijuana?
Someone who smokes marijuana regularly can have many of the same respiratory problems as cigarette smokers. Persistent coughing, symptoms of bronchitis and more frequent chest colds are possible symptoms. There are over 400 chemicals that have been found in marijuana smoke. Benzyprene, a known human carcinogen, is present in marijuana smoke. Regardless of the THC content, the amount of tar inhaled by marijuana smokers and the level of carbon monoxide are 3 to 5 times higher than in cigarette smoke. This is most likely due to inhaling marijuana more deeply, holding the smoke in the lungs and because marijuana smoke is unfiltered.
