Marijuana smoke contains many of the same harmful compounds as tobacco smoke and affects the lungs | Research

The takeaway

A review by pulmonologists found that marijuana smoke shares many harmful combustion products with tobacco smoke, though the patterns of use differ, and inhalation remains the most common route of cannabis consumption.

Read this if you want to understand how smoking marijuana affects your lungs.

Cannabis smoke contains similar harmful combustion products to tobacco smoke

What the researchers found

The review established that marijuana smoke and tobacco smoke share many of the same combustion byproducts, including carcinogens and respiratory irritants. However, the two substances differ in psychoactive components and patterns of use (frequency, inhalation depth, breath-holding).

Cannabis smoke affects the respiratory tract, and the review compiled evidence on how marijuana inhalation impacts lung function. The authors emphasized that since inhalation is the most popular route of cannabis consumption, the respiratory effects deserve attention from pulmonary specialists.

Why it matters

With cannabis use prevalence estimated at 2.5-5% globally, a significant portion of the population regularly inhales combustion products. Pulmonologists need current evidence to counsel patients, but much of the existing guidance focuses on tobacco. This review bridges that gap.

The numbers in context

Cannabis use prevalence: 2.5-5% globally. Cannabis is the second most commonly smoked substance after tobacco. Inhalation is the most popular route of consumption.

How the study worked

Narrative review aimed at providing pulmonologists with updated scientific information on the respiratory effects of marijuana use. Focused on combustion products, exposure patterns, and clinical respiratory outcomes.

What this study cannot tell us

Narrative review without systematic methodology. The abstract provides limited detail on specific findings. Cannabis use patterns vary widely, making generalizations about respiratory risk difficult. The review does not address non-combustion routes (vaporization, edibles).

How to read the evidence

Narrative review by pulmonologists. Provides clinical perspective but the abstract lacks detailed findings from the underlying evidence.

When this study was published

Published in 2017. Research on cannabis-specific respiratory effects has expanded with legalization.

The bigger picture

The respiratory effects of cannabis are often dismissed because cannabis users typically smoke less frequently than tobacco users. However, cannabis smoking involves deeper inhalation and longer breath-holding, which may increase per-joint exposure. As cannabis use normalizes, respiratory medicine needs evidence-based guidance specific to cannabis.

Questions still open

Does vaporization significantly reduce respiratory harm compared to smoking? Are the lung effects of cannabis smoke dose-dependent? Do cannabis-only smokers develop different respiratory diseases than tobacco smokers?

Common questions

Is smoking marijuana as bad for your lungs as cigarettes?

Marijuana smoke contains many of the same harmful compounds as tobacco smoke. However, typical use patterns differ: most marijuana users smoke less frequently than cigarette smokers. Whether the deeper inhalation and breath-holding of marijuana compensates for lower frequency is still debated.

Do alternatives to smoking avoid lung damage?

The review focused on inhalation (the most common route). Non-combustion methods like vaporization or edibles would be expected to reduce respiratory exposure, but this review did not specifically address those alternatives.

Read the original research

Lung Disease Associated With Marijuana Use.

Archivos de bronconeumologia, 53(9), 510-515

View on PubMed ↗Publisher’s paper ↗

Citation

Chatkin, José Miguel; Zabert, Gustavo; Zabert, Ignacio; Chatkin, Gustavo; Jiménez-Ruiz, Carlos Andrés; de Granda-Orive, Jose Ignacio; Buljubasich, Daniel; Solano Reina, Segismundo; Figueiredo, Ana; Ravara, Sofia; Riesco Miranda, Juan Antonio; Gratziou, Christina. (2017). Lung Disease Associated With Marijuana Use.. Archivos de bronconeumologia, 53(9), 510-515. https://doi.org/10.1016/j.arbres.2017.03.019