8 doctors weighed in:
Can smoking weed once a week give you lung cancer and/or emphysema?
8 doctors weighed in

Dr. Dennis Clifford
Internal Medicine - Pulmonary Critical Care
2 doctors agree
In brief: Probably not
Moderate cannabis smoking has not been associated with developing emphysema or lung cancer.
Heavy users can develop chronic bronchitis.

In brief: Probably not
Moderate cannabis smoking has not been associated with developing emphysema or lung cancer.
Heavy users can develop chronic bronchitis.
Dr. Dennis Clifford
Dr. Dennis Clifford
Thank
1 comment
Dr. Martin Raff
Chronic bronchitis has the potential to lead to emphysema
Chinelo Ikpeama
Obstetrics & Gynecology
2 doctors agree
In brief: Perhaps
Currently, there is no link between marijuana and lung cancer or emphysema.
There has been no conclusive research linking marijuana to lung cancer or emphysema. However, marijuana has been linked to a multitude of other health problems, and just because there is no research demonstrating a link to lung cancer or emphysema does not mean that a link does not exist. More research must be done.

In brief: Perhaps
Currently, there is no link between marijuana and lung cancer or emphysema.
There has been no conclusive research linking marijuana to lung cancer or emphysema. However, marijuana has been linked to a multitude of other health problems, and just because there is no research demonstrating a link to lung cancer or emphysema does not mean that a link does not exist. More research must be done.
Chinelo Ikpeama
Chinelo Ikpeama
Answer assisted by Chinelo Ikpeama, Medical Student
Thank
2 comments
Dr. Martin Raff
Although many things seem intuitively correct, like toxicity from smoking MJ, as Dr. Ikpeama points out, the data is lacking. It took decades to prove tobacco lethal. Will probably take a lot longer for weed.
Dr. Dennis Clifford
I totally disagree with this comment which demonstrates the typical bias against a drug that has been used for 3000 years without any evidence of harm. Show me the evidence of "multitude of other health problems" which is dissembling at best.
Dr. Martin Raff
Internal Medicine - Infectious Disease
1 doctor agrees
In brief: Data lacking
Since the exact cause of the oncogenic (cancer-causing) effects of tobacco is not entirely clear, and the simple role of a chronic irritant has not been clearly delineated, any opinions are pretty much guess work, and as stated earlier, more data is needed.

In brief: Data lacking
Since the exact cause of the oncogenic (cancer-causing) effects of tobacco is not entirely clear, and the simple role of a chronic irritant has not been clearly delineated, any opinions are pretty much guess work, and as stated earlier, more data is needed.
Dr. Martin Raff
Dr. Martin Raff
Thank
Dr. Joseph Woods
Pathology
1 doctor agrees
In brief: Perhaps.
While risk varies for different people, the main risk factor for lung cancer is tobacco use, especially cigarette smoking.
Smoking other things, like weed does not appear to have a strong link to increased risk for lung cancer, but is not a good idea, because if you smoke that, you may also smoke cigarettes. See your doctor to be sure.

In brief: Perhaps.
While risk varies for different people, the main risk factor for lung cancer is tobacco use, especially cigarette smoking.
Smoking other things, like weed does not appear to have a strong link to increased risk for lung cancer, but is not a good idea, because if you smoke that, you may also smoke cigarettes. See your doctor to be sure.
Dr. Joseph Woods
Dr. Joseph Woods
Thank
Dr. Loki Skylizard
Surgery - Thoracic
In brief: YES
Recent studies have found links of lung cancer to smoking marijuana.
Marijuana is a risk factor. Its impact is dependent on intensity of exposure and duration. The best information to date is that it is a carcinogen linked to developing lung cancer. Emphysema changes are demonstrated in lung tissue of mj smokers.

In brief: YES
Recent studies have found links of lung cancer to smoking marijuana.
Marijuana is a risk factor. Its impact is dependent on intensity of exposure and duration. The best information to date is that it is a carcinogen linked to developing lung cancer. Emphysema changes are demonstrated in lung tissue of mj smokers.
Dr. Loki Skylizard
Dr. Loki Skylizard
Thank
2 comments
Dr. Loki Skylizard
It has been difficult to study because of legal status of use. However, it is NOT just a "benign herb" as many would suggest. Inhaling products of combustion (burning) are not good for your lungs. Please be well and respect your body.
Dr. Chad Levitt
Agree with above however we don't know about risks when it is taken in other forms, as in edibles or in a vaporized manner.
Get help from a real doctor now
Dr. Eric Weisman
Board Certified, Neurology
32 years in practice
9M people helped
Continue
108,000 doctors available
Read more answers from doctors