A member asked:

Need to know is weed harmful like cigarettes?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

For airway?: Marijuana smoke contains bronchial irritants. Inhalation with marijuana is more prolonged ; deeper than with tobacco. Higher combustion temperatures are reached because it is smoked to a shorter butt. This leads to a carboxyhemoglobin concentration that is 5 x ^ than tobacco. 3 x more tar is inhaled. Prolonged use of cannabis can lead to airway inflammation, wheezing ; ^ in sputum production.

Answered 8/9/2015

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