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Marijuana. Respiratory tract effects

B E Van Hoozen1, C E Cross

  • 1Division of Pulmonary and Critical Care Medicine, University of California at Davis, Sacramento 95817, USA.

Clinical Reviews in Allergy & Immunology
|November 14, 1997
PubMed
Summary
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Daily marijuana smoking harms lung function and causes respiratory symptoms. While it may contribute to chronic obstructive pulmonary disease (COPD), long-term heavy use is likely required for overt disease.

Area of Science:

  • Pulmonology
  • Oncology

Background:

  • Daily marijuana smoking mirrors tobacco's adverse effects on pulmonary function and respiratory symptoms like cough and sputum production.
  • Evidence suggests potential links between marijuana smoke and mutagenic/carcinogenic properties, with documented case reports of upper airway and lung cancers.

Purpose of the Study:

  • To explore the respiratory and carcinogenic risks associated with daily marijuana smoking.
  • To investigate the potential for marijuana smoke to induce respiratory diseases and cancers.

Main Methods:

  • Review of existing literature on marijuana smoking's effects on pulmonary function and respiratory symptoms.
  • Analysis of case reports and observational series regarding marijuana smoking and cancer induction.

Main Results:

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  • Marijuana smoking causes respiratory symptoms (cough, wheeze, sputum) and pulmonary function decrements similar to tobacco smoking.
  • Marijuana smoke has established mutagenic/carcinogenic properties, with potential links to laryngeal, oropharyngeal, and bronchogenic carcinoma.
  • A hypothesis suggests marijuana smoking may disproportionately affect the upper respiratory tract, though further longitudinal studies are needed.

Conclusions:

  • Daily marijuana smoking poses significant risks to respiratory health, including potential development of chronic obstructive pulmonary disease (COPD) with prolonged heavy use.
  • The carcinogenic potential of marijuana smoke, particularly for upper airway cancers, warrants further investigation through longitudinal studies.