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Marijuana and Asthma

Asthma is a chronic condition of the lungs that’s caused by inflammation of your airways. As a result, your airways constrict. This leads to wheezing and breathing difficulties.

According to the National Heart, Lung, and Blood Institute , more than 25 million Americans have asthma. Many of them are searching for natural and alternative treatment methods. This includes marijuana (cannabis).

Marijuana is being legalized in many states. Some states have legalized it for medical purposes only. Others have legalized both medical and recreational use of this drug.

You may be wondering whether marijuana could be a potential treatment for asthma, or perhaps you think it probably makes asthma worse. In fact, while smoking marijuana can worsen breathing problems, taking other forms of the plant that don’t require smoking may potentially benefit people with asthma.

A growing body of research is focusing on marijuana’s effects on asthma and whether cannabis plants can offer some relief for the condition. The focus isn’t so much on smoking marijuana joints, but rather on taking cannabinoids instead.

Cannabinoids are naturally occurring substances in marijuana plants. They are sometimes used to treat chronic pain and neurological conditions, such as arthritis and multiple sclerosis. This is due to their anti-inflammatory properties.

Since asthma is caused by a chronic inflammation of the lungs, researchers are trying to find out whether cannabinoids can have similar effects for this condition. Research is especially promising for people who have allergic asthma.

Cannabinoids may be available in the form of supplements. These substances may also be derived from smoking marijuana in nontraditional forms. A 2013 study in the journal Substance Abuse found that people who smoke marijuana using vaporizers gained more benefits from the plant with less lung-irritating smoke.

Still, there are some limits to these potential benefits. One study published in Current Opinion in Pulmonary Medicine contends that short-term medicinal uses of marijuana may not harm the lungs. This is compared to recreational or heavy smoking. However, it’s not clear just how much is safe or for exactly how long.

Despite any possible benefits, marijuana also poses enormous risks if you have asthma. This is particularly the case if you smoke it. Smoking any substance can increase inflammation in your lungs. This makes asthma symptoms worse.

Smoking marijuana may even increase your risk for an asthma attack. In severe cases, you may need to be hospitalized for an asthma attack. This helps to prevent life-threatening complications.

When you smoke marijuana, large air sacs called bullae may start to develop in your lungs. These can eventually disrupt your breathing. According to the American Thoracic Society, you’re at an increased risk of developing bullae from smoking marijuana if you’re under the age of 45.

Over time, bullae can grow and cause shortness of breath. What’s even more dangerous is the development of pneumothorax. This is a life-threatening condition that occurs when bullae rupture in the lungs.

In the short term, smoking marijuana can cause:

  • frequent coughing
  • lung infections
  • phlegm
  • shortness of breath
  • wheezing

Smoking is perhaps one of the most common ways to use marijuana. Still, this isn’t the only form of marijuana available.

Aside from traditional joints, some people prefer smoking marijuana with other tools such as bong. In theory, these can help reduce the amount of smoke you inhale. However, not enough studies have been done to determine whether such devices make smoking marijuana any safer.

Vaping marijuana by warming the plant results in less smoke being inhaled. CBD and THC, two compounds of marijuana, can be taken orally in food or capsules. Oils with CBD can be applied to the skin. The entire marijuana plant is often available in food products.

Nonsmoking forms of marijuana are also less likely to irritate your lungs. These include extracts that may be mixed with food and CBD oils that are available as supplements.

Numerous conventional treatment options are available for people with asthma. Aside from quick-relief medications, such as inhalers, your doctor may recommend drugs that provide more long-term control. These help stop asthma symptoms before they become problematic by decreasing inflammation. Examples include:

  • nebulizers
  • inhaled corticosteroids
  • leukotriene tablets

If you’re looking for more “natural” forms of asthma treatment, talk to your doctor about the following options:

  • breathing exercises
  • meditation
  • massage
  • acupuncture

When it comes to using marijuana for asthma, there’s an ongoing debate about the benefits versus the risks. The negative effects of tobacco smoke — especially for people with lung diseases such as asthma — have been well-established. As marijuana becomes legalized in many areas, only then can more research be done.

However, the bottom line is that smoking marijuana can indeed be harmful if you have asthma. Overall, smoking marijuana is unsafe for people with lung disease.

Talk to your doctor about all the options for asthma treatment, and ask whether other forms of marijuana could benefit your particular case.

Last medically reviewed on December 6, 2018

Marijuana (cannabis) is being legalized in many states. You may be wondering whether marijuana could be a potential treatment for asthma. A growing body of research is focusing on marijuana’s effects on asthma and whether cannabis plants can offer some relief for the condition. Learn the benefits and risks.

Why People With Asthma Can Benefit From Edibles

Asthma runs in my family, and growing up working-class in the inner city — pollution, roaches, and asbestos in public schools — didn’t help my lungs as a child. My respiratory issues could be worse, but they’re bad enough to get in the way of some of my favorite athletic pursuits like hiking and cycling. Even being within a block of a cigarette smoker can bring on a cough that lasts for hours. Doctors put me on a corticosteroid inhaler years ago, and I’ve often wondered what year after year of sucking steroids into my lungs is doing to my body over the long term.

These days, I live in Oregon where marijuana is legal for both medical and recreational use. I can walk just a few blocks from my Portland apartment and buy weed at a store, where a “budtender” can answer my questions about strains (indica or sativa), about chemical makeup (more terpenes, higher CBD-to-THC ratio, and other components), and about administration (tincture, syrup, or vaporizer). Recently, I decided to stop my daily routine of inhaling steroids and try using weed as my primary anti-asthma medicine.

How does weed use affect lung health?

Medical research has repeatedly shown that weed can benefit lung health. One 2012 study using data from a 20-year period had stunning results: Pot smokers not only had better lung function than cigarette smokers but “low to moderate” pot smokers also had better lung capacity than people who didn’t smoke anything. For many asthmatics, though, smoking a joint can cause more problems; even if the smoke carries beneficial medicine, it’s not really worth the trouble of irritating already-sensitive lungs even more.

However, Canadian researchers found that some pot smoke can be even more toxic than tobacco smoke. In the 2008 study published in the journal Chemical Research in Toxicology, government researchers from Health Canada’s Safe Environments Programme found that pot smoke contained 20 times the ammonia levels as did tobacco smoke. Hydrogen cyanide and nitrogen chemicals were also found in concentrations three to five times higher in marijuana smoke.

That doesn’t necessarily mean marijuana harms lungs — it just means that smoking anything can introduce unwanted chemicals into the respiratory system. But with recreational pot legally for sale in nine states and medical marijuana available in over half of U.S. states, it’s easy to find other ways to introduce cannabis into your health regimen.

Cannabis is not just THC, or tetrahydrocannabinol, the chemical that famously becomes psychoactive when heated and gets you high. There are over 400 different chemicals that make up the plant, according to a 2012 study in the journal Therapeutic Advances in Psychopharmacology, including at least 60 of what are called cannabinoids. Those cannabinoids interact with the human body, specifically with what medical professionals call the endocannabinoid system — numerous receptors that bind with chemicals present in marijuana and affect the body and mind in different ways.

So, why do people with respiratory issues use weed?

It may seem far-fetched to imagine a doctor telling their asthmatic patients to use weed, but that’s exactly what Janice Knox does. She’s spent 32 years working as a board-certified anesthesiologist before she began studying the impact of cannabis on illness, and now, she incorporates cannabis into her consultations with patients at her family’s American Cannabinoid Clinics in Oregon, where her husband and two daughters — all physicians — also practice.

Knox says endocannabinoid receptors called CB1 and CB2 work in the lungs to modulate immune responses to inflammation. “People have been treating the symptoms of asthma for years, but in the case of cannabis in the lungs, it’s a CB1, CB2 receptor on those bronchioles,” Knox tells Allure. “And if we know it’s chronic inflammation, we know which part of the cannabis is going to work best on those receptors — it’s going to be the THC and the CBD as an anti-inflammatory.”

She also says that one of the main building blocks for asthma is inflammation — in fact, inflammation is a major part of many disease processes. “[Asthma is] a chronic inflammatory process that involves the lungs, the bronchioles, etc. And it’s an imbalance in the immune system that the endocannabinoid system does address,” she continues. But Knox acknowledges that smoking pot can be less than ideal for people with asthma and other respiratory conditions: “With smoking, when you heat it, you get those breakdown cells, those byproducts that can cause some irritation to the bronchial tree. You want to avoid those products — polycystic aromatics, hydrocarbons, ammonia, carbon monoxide.”

How can you ingest cannabis instead of smoking it?

Smoking pot releases the chemical we’re all familiar with: THC, or specifically Delta-9 tetrahydrocannabinol. Knox explains that eating marijuana can result in a dramatically different body high because of the way the liver breaks down cannabis. “It’s broken down in the liver into something called 11-hydroxy tetrahydrocannabinol (abbreviated as 11-OH-THC). That’s more intoxicating than Delta-9 THC,” says Knox. “You may not want to start with edibles for a more naive patient.”

Eating marijuana can result in a dramatically different body high because of the way the liver breaks down cannabis.

That kind of breakdown and absorption process can also hinder the benefits of weed for people with GI issues like irritable bowel syndrome or colitis, Knox explains. “Something where the gut is sick, it may not absorb as well. We try to get a different way to get the product into the body.”

In a legal market like Oregon, alternatives to smoking are widely available in stores. A person with asthma or other lung ailments can walk into a weed store and buy a high-CBD, low-THC blend in the form of candies, capsules, drops, or even a nebulizer — a cool-mist, smoke-free inhaler. But what to do in the majority of the country where the most-likely available product is old-fashioned flower? That’s where a portable decarboxylator comes in handy.

How does a decarboxylator work?

Traditionally, making edibles or other consumable forms of marijuana at home meant “decarbing” weed by cooking it until stinky in an oven at a precise temperature or arduously distilling the flower into butter or oil form before making brownies. Raw marijuana won’t kill you if you eat it, but it won’t get you high or release the majority of its medicinal compounds, either, in its naked acidic form. So I was excited when Ardent — a woman-of-color-owned company based in Massachusetts — sent me a decarboxylator. About the size of a coffee grinder or an Amazon Echo, Ardent’s sleek little machine made prepping my weed simple without making my entire apartment building reek of pot.

Instead of risking further lung irritation by smoking, one writer tries making weed edibles with the help of a decarboxylator to see if they help ease the symptoms of her lifelong asthma.