can smoking weed cause gastritis

Pot pains: Why marijuana can become toxic for some

Marijuana is having a moment. The once recreational-use-only drug is now considered by many as a medicine, an anti-nauseant and pain reliever, even an epilepsy medication.

But some long-term “pot heads” are finding the drug they once loved can suddenly turn on them and become almost toxic.

These users are developing a little-understood condition called cannabinoid hyperemesis syndrome that brings on unrelenting vomiting, nausea and stomach pain.

Standard medications do not relieve it, smoking more marijuana only seems to worsen it, and some doctors say they are seeing a lot more cases of it.

It was intense stomach pains that brought Dave to his doctors four months ago. The 45-year-old from southern Ontario (who’d prefer not to use his full name) knew he needed help when intense cramping left him balled up on the sofa, unable to work.

“I really wasn’t able to function much at all. I was constantly having to lie down with a constant pain,” he told by phone.

Even after Dave’s doctor ordered reams of ultrasounds, CT scans, and colonoscopies, no one could find anything wrong with him, leaving Dave frustrated.

“It was starting to take a toll on me after a few months. I was doing all these tests and not knowing what was wrong with me or who to turn to,” he says.

Dave finally turned to the internet, where he stumbled on discussions about cannabinoid hyperemisis, a condition he had never heard of.

History of hyperemesis

The first mention of the syndrome appeared in 2004, when a doctor in Australia published an article in the journal Gut describing several patients with a “cyclical vomiting illness” (or hyperemesis). All the patients had a history of “chronic cannabis abuse” and all seemed to find relief from their symptoms by taking multiple hot showers or baths a day.

“Everything I read about this CHS fit the picture,” Dave says.

“The only thing I didn’t have was the vomiting. But I had nausea and constant stomach pain and I was getting relief with hot baths and showers,” he said.

Dave also had a 25-year history of daily pot smoking. He had recently switched to smoking “shatter,” a marijuana concentrate high in THC, that he believes made things worse. Though Dave had told his doctor about his drug use, he connect his symptoms to CHS. In fact, the physician may have never seen another patient with CHS.

Emergency room doctors such as Dr. Raj Waghmare are seeing them, however. Waghmare recently wrote a blog post about the first time he diagnosed a patient with CHS, just under two years ago.

The well-dressed man had come into his ER with non-stop vomiting and abdominal pain. Like Dave, this man’s blood and urine test came out normal, yet no matter what drug Waghmare offered him, nothing seemed to quell his nausea.

Then the man mentioned that hot baths helped to dull the pain.

That’s when Waghmare recognized CHS from an article he had read about in a Canadian medical journal.

It’s a condition that can’t be easily diagnosed, since there is no one test that can spot it. It’s only after everything else has been ruled out and a history of pot use has been established that doctors are left with CHS.

Waghmare says he’s since seen dozens more patients with CHS come through the doors of Southlake Regional Health Centre where he works.

“I probably see this every week in the ER,” he says. “if we were to go through all the charts from a full week, I’m sure we’d see at least a case of day among all the doctors.”

Most of the patients Waghmare sees had no idea that the drug they used every day could suddenly become toxic to them.

“People don’t know that this exists,” he says.

What actually causes CHS remains a mystery. The THC (tetrahydrocannabinol) in marijuana causes the drug’s high by stimulating the brain’s cannabinoid receptors, but one theory is that in some patients, those receptors eventually become overloaded.

“So it will work for nausea in the beginning, but then it will totally desensitize the receptors so that people will just feel nauseated all the time,” says Waghmare.

Why some patients develop the syndrome and others don’t remains a mystery; the condition hasn’t been the subject of rigorous scientific study. It appears to develop in those who smoke weed several times a day for a decade or so. But there is some evidence that people who begin daily pot use at a young age are more at risk.

The majority of CHS patients coming to see Waghmare are young men who have been smoking marijuana since high school. By the time they reach their mid-20s, they have a decade of use under their belts.

And yet many refuse to believe the pot is the problem.

When Waghmare tells young pot users the only thing that will end their vomiting and pain is to quit smoking weed for good, they often stop listening.

“A lot of these patients who come in are ‘frequent flyers,’ They’ve heard it before and they refuse to believe it. They refuse to give it up,” he says.

But older patients often take his advice and quit cold turkey, as the patient who Waghmare wrote about promised he would do. As an ER doc, however, he has no way of following up.

At least one Facebook group has also been formed in which users discuss their symptoms and experiences.

As for Dave, he says has stopped smoking both marijuana and shatter. In fact, he wishes he never tried shatter at all, since he suspects that is what triggered his symptoms. Now, after three months of pain, he’s finally beginning to feel better. He’s also found a new doctor and has begun a new drug regimen for his Type 2 diabetes, which is also helping him feel better.

But doctors like Waghmare says there needs to be more awareness that this syndrome can develop in some pot users.

With all the recent discussions about the medicinal uses for marijuana, and the ongoing discussion about legalization, Waghmare says many pot users assumes the drug is benign, that it relieves pain and nausea, that there’s no way it could cause it.

“There’s this belief that (marijuana) is totally safe, a miracle drug, Not true,” he says.

In this Feb. 17, 2016 photo, plants grow at the home of Jeremy Nickle, in his backyard in Honolulu, Hawaii. (AP / Marina Riker)

Medical marijuana users insist that using pot does their bodies good, but doctors are seeing an increasing number of long-time smokers discovering that the drug they once loved because it took away their pain is now making them sick.


Updated on April 7, 2020. Medical content reviewed by Dr. Joseph Rosado, MD, M.B.A, Chief Medical Officer

Many people take having the ability to absorb nutrients and a healthy digestive system for granted. But, for those who have gastritis, life isn’t as simple. And, if you have the condition, you know it can be a life-altering impairment and dramatically reduce your day-to-day quality of life. The good news: now, you can add medical cannabis for gastritis to the growing list of potential treatments for this condition.

How/Why Marijuana Can Be an Effective Treatment for Gastritis

Gastritis can be a serious condition that significantly reduces a patient’s quality of life. Traditional treatment for gastritis strives to eliminate the causes and provide the patient with relief from the symptoms. Antacids and proton pump inhibitors, however, can have some serious long-term use side effects that eventually lead to even more severe health concerns.

These drugs typically come with disclaimers to warn the patient to discontinue use after a relatively short period — and for good reason. These drugs act by either removing or neutralizing the acid produced in the stomach. When acid is eliminated or reduced, however, the patient’s general health declines because the body can’t properly absorb essential nutrients.

Medical marijuana offers many of the benefits of conventional gastritis treatment options but without the adverse side effects. Medical marijuana has long been known to stimulate the appetite as well as reduce nausea and vomiting. Also, medical marijuana also offers anti-inflammatory benefits to help reduce the inflammation in the stomach caused by gastritis.

Medical Marijuana and Gastritis: Clinical Evidence

Clinical studies have repeatedly shown that marijuana acts as an appetite stimulate. Time and time again, studies on cancer patients who have lost their appetite due to chemotherapy have shown medical marijuana does, indeed, act to stimulate the desire for food. Also, these same studies have shown cannabis works to reduce nausea and vomiting.

A long-term study conducted from 1975 through 1996 concluded medical marijuana is at least as effective, if not more effective, than traditionally prescribed drugs used to treat nausea. For anyone suffering from gastritis, the road to recovery must include eating right and providing the body with proper nutrients. Medical marijuana can help the patient by sparking the desire to eat and reduce the possibility of feeling nauseous or vomiting after eating or between meals.

Along with combating nausea, vomiting, and the loss of appetite you can experience with gastritis, medical cannabis may be helpful in treating the stomach itself. Medical marijuana has also been shown to be an effective anti-inflammatory drug. Medical marijuana contains Cannabidiol, or CBD, an essential component of marijuana which has been shown to have anti-inflammatory properties.

Along with CBD, medical cannabis has been shown to reduce tissue inflammation as a result of the presence of the compound β-caryophyllene. Both CBD and β-caryophyllene work to reduce inflammation in the stomach of a gastritis sufferer, without the side effects caused by antacids and proton pump inhibitors.

The Bath and Bristol University ran a study in 2001, which revealed that digestive system CB1 and CB2 receptors respond to natural cannabinoids, reducing muscle spasm pain, slowing down gut motility and reducing the chances of diarrhea occurring.

When there’s damage to your gut, it’s thought receptors in your gut help the healing process. During the study, the researchers induced gut inflammation intentionally and then added cannabinoids. The results showed that the treatment worked.

What Symptoms of Gastritis Can Medical Marijuana Treat?

Common symptoms of gastritis include:

  • Abdominal bloating
  • Nausea
  • Indigestion
  • Recurrent upset stomach
  • Vomiting coffee ground-like material or blood
  • Loss of appetite
  • Hiccups
  • Gnawing or burning feeling in your stomach after eating or at night
  • Black tarry stool

As you’ve seen through the literature, medical cannabis can treat most if not all of these symptoms. Medical marijuana for gastritis can also help ease the mental effects gastritis may bring on such as anxiety, depression and panic attacks.

It even goes so far as treating the side effects of gastritis medications like headaches, insomnia, and other sleep problems and sexual problems.

Best Strains of Marijuana to Use for Gastritis Side Effects

The therapeutic dose of cannabis depends on the amount you want to use and should use. So, if you smoke marijuana on a daily basis, you may require an entire joint to ease your pain, whereas being a newbie, you may only need a couple of puffs.

The strain of marijuana you pick is just as important, and you should tailor it to your symptoms. For instance, sativa strains are typically thought to give you more energy, increase immunity and not send you to the fridge looking for food.

Indica strains, on the other hand, offer more painkilling abilities, and they are also a considerable appetite booster. If you’re looking for all the benefits cannabis provides, try a hybrid strain rich in CBD. For gastritis, strains like Trainwreck, Strawberry Haze, and Super Lemon Haze should do the trick.

Other strains you may want to try for the more general symptoms like nausea, inflammation, pain, appetite, depression, and anxiety include:


One of the primary medical uses of weed is to increase the appetite and treat nausea. Nausea can occur for many reasons. Many gastritis treatments cause nausea. To help ease this side effect, try these strains below.

  • Northern Lights (Indica)
  • Super Lemon Haze (Hybrid)
  • Lavender (Hybrid)
  • White Fire OG (Hybrid)


Inflammation occurs due to a wide range of chronic illnesses. Medical cannabis can help, fortunately. When you’re struggling with gut inflammation, medical pot can offer you significant relief. These are suitable weed strains for treating inflammation.

  • CBD Shark (Hybrid)
  • Green Crack (Sativa)
  • Remedy (Indica)
  • Blue Haze (Hybrid)

Medical marijuana is often used for pain, whether it’s headaches, inflammation, abdominal pain, neuropathic pain, muscle soreness or something else. Depending on the intensity and type of pain they experience, patients see varying degrees of success with using marijuana to treat their pain. Some great strains for pain relief include:

  • Blackberry Kush (Indica)
  • ACDC (Hybrid)


For those who are seriously ill and are suffering a lack of appetite because of their illness, medications or for other reasons, an increase in appetite is life-saving. If you lack an appetite, try these strains.

  • Pineapple Express (Hybrid)
  • Orange Kush (Hybrid)


While you may not agree with it, many individuals self-medicate with weed to relieve their symptoms of depression. Studies even suggest an association between your body’s endocannabinoid system and depression, which could explain why there are many people prefer marijuana over pharmaceutical alternatives. These strains should help if you’re struggling with depression due to your gastritis condition.

  • Harlequin (Sativa)
  • Jack Herer (Sativa)


It can be tough living with anxiety. Taking prescription medications can worsen your symptoms. They might not help at all. Fortunately, on top of cannabis’s long list of ailments it treats, is anxiety. Some strains that may be beneficial to you are as follows.

  • White Diesel (Hybrid)
  • Fruit Loops (Hybrid)

Best Methods of Marijuana Treatment to Use to Treat Side Effects of Gastritis

These days, patients have more options available to them for consuming their favorite marijuana strains than ever. From vaporizing and smoking to concentrates, tinctures and topicals, there’s a method for using medical cannabis for everyone — even those individuals who need to maintain discretion due to unapproving landlords, co-workers or housemates. Even if you have respiratory issues or pain, there is a marijuana ingestion method that meets your needs.

Methods of use may include:

  • Smoking
  • Vapor
  • Edibles
  • Topicals
  • Tinctures
  • Concentrates
  • Raw cannabis
  • Suppositories
  • Juicing cannabis

Browse for Medical Marijuana for Gastritis Help

As you can see, you have plenty of options out there to reap the benefits of medical weed for gastritis treatment. Your next step is to search for a medical marijuana dispensary or find a doctor. You can then obtain your marijuana card and find a dispensary to get your marijuana to help treat your gastritis symptoms.

What Is Gastritis?

When you have gastritis, your stomach lining, called mucosa, becomes swollen and inflamed. Your mucosa contains glands responsible for generating a pepsin enzyme and stomach acid. The acid in your stomach breaks your food down while pepsin digests the protein. You have a thick mucus layer coating the lining of your stomach and helps keep your stomach tissue from being dissolved by the acidic digestive liquid.

When the lining of your stomach becomes inflamed, it generates fewer enzymes and less acid. But, it also produces less mucus and other materials to keep your stomach lining protected from the acidic digestive liquid.

Types of Gastritis

You can develop two types of acute and chronic gastritis.

Acute Gastritis

Acute gastritis is a swelling or inflammation of your stomach lining. It may cause nagging and severe pain. It can come on suddenly, but the pain is usually temporary and only lasts for quick bursts at a time.

Several things can cause acute gastritis such as:
  • Bacteria
  • Injury
  • Stress
  • Viruses

It may also occur due to ingesting irritants like:

  • NSAIDs
  • Alcohol
  • Spicy food
  • Steroids

While acute gastritis occurs suddenly and lasts only temporarily, chronic gastritis appears more gradually and lasts longer.

Chronic Gastritis

Chronic gastritis occurs when the lining of your stomach becomes inflamed.

Causes of inflammation include:
  • Chronic stress
  • Too much alcohol
  • Certain medications
  • Immune system problems

Your stomach lining can change when this inflammation occurs, and it loses some of its protective cells. Inflammation can also lead to early satiety, which is when your stomach feels full when you’ve only had a few bites of food.

Since this type of gastritis occurs over a gradual period, it wears away at the lining of your stomach slowly. It may cause dysplasia or metaplasia. Both are precancerous cell changes potentially leading to cancer if not treated.

With treatment, however, chronic gastritis typically gets better, although you’ll likely need ongoing monitoring.

Some individuals with a damaged stomach lining may develop reactive gastritis.

Reactive gastritis may:

  • Cause erosions
  • Be chronic or acute
  • Cause no or little inflammation

Reactive gastropathy is another name for reactive gastritis when it causes no inflammation or very little.

Gastritis may also be either erosive or non-erosive:

  • Erosive gastritis may wear your stomach lining away causing ulcers (deep sores) or erosions (shallow breaks) in your stomach lining.
  • Non-erosive gastritis leads to inflammation in the mucosa, but ulcers or erosions aren’t present with non-erosive gastritis.

Certain irritations, such as chronic vomiting or anti-inflammatory drugs, can cause gastritis. However, there are other causes as well including:

  • Bile reflux: A bile backflow from your bile tract (connects your gallbladder and liver) into your stomach.
  • Helicobacter pylori (H.pylori): A bacteria living in your stomach’s mucous lining. The infection may cause ulcers or stomach cancer without treatment.
  • Infections: Viruses and bacteria can cause infections.

When you leave gastritis untreated, it may increase your risk of stomach cancer and lead to severe blood loss.

History of Gastritis

Researchers have known about and have been studying chronic gastritis since the 20th century in earlier decades. However, the condition didn’t receive much attention until 1982 after Warren and Marshall discovered Helicobacter pylori.

There’s been a noticeable decline in the prevalence of chronic gastritis during the past decades in developed populations. But, it’s still among the most common severe pandemic infections with serious death consequences like gastric cancer and peptic ulcer. Worldwide, on average, over half of individuals could presently have chronic gastritis.

Effects of Gastritis

Common gastritis symptoms may include:
  • Pain
  • Upset Stomach
  • Heartburn
  • Dyspepsia (indigestion)
  • Nausea
  • Loss of appetite
  • Abdominal pain
  • Vomiting (potentially blood, which looks like coffee grounds)
  • Hiccups
  • Dark stools

Just about everybody has experienced stomach irritation and indigestion. Typically, these don’t require medical care and are short-lived. If your symptoms of gastritis last longer than a week, or you still feel discomfort after taking an over-the-counter (OTC) or prescription pain reliever, see your doctor.

Gastritis patients also are at significant risk for anxiety and mood disorders, according to studies. After accounting for gender, age, and socioeconomic status, researchers of the study found gastritis patients were substantially more at risk than the general population for panic attacks, anxiety disorder, mood disorder, major depression and social phobia in the past 12 months.

Gastritis Statistics

Statistics regarding gastritis reveal:

  • An approximate 50 percent of the worldwide population has the H. pylori infection, which causes most gastritis cases.
  • Between 20 to 50 percent of the U.S. population could have the H. pylori infection.
  • In the U.S., H. pylori bacteria cause around 1.8 to 2.1 million doctor office visits every year. It’s especially common in individuals over 60 years old.

Current Treatments Available for Gastritis and Their Side Effects

Gastritis treatment depends on the cause of the condition. For instance, when alcohol or anti-inflammatory drugs cause acute gastritis, the treatment would typically be to stop using those substances.

Some gastritis medications include:

Antibiotic Medications

Antibiotics kill H. pylori. When you have H. pylori in your digestive tract, your physician may prescribe a combination of antibiotics, like amoxicillin and clarithromycin or metronidazole, to kill the bacteria. However, you have to take the full prescription.

Side effects of antibiotics may include:
  • Nausea
  • Vomiting
  • Indigestion and bloating
  • Diarrhea
  • Loss of appetite
  • Abdominal pain

Proton Pump Inhibitors (PPI)

These medicines promote healing by blocking acid production. Proton pump inhibitors prevent the cell action of producing or reducing acid. Both OTC and prescription PPI medications include:

  • Prilosec
  • Aciphex
  • Prevacid
  • Dexilant
  • Nexium
  • Protonix

When you use PPIs long-term, especially at high doses, you could increase your risk of wrist, hip and spine fractures. Calcium supplements may help reduce this risk.

Side effects of proton pump inhibitors may include:
  • Diarrhea
  • Headache
  • Flatulence
  • Constipation
  • Nausea
  • Fever
  • Abdominal pain
  • Vomiting

Acid Blockers

These medications, also known as histamine (H-2) blockers, reduce how much acid releases into your digestive tract and encourages healing and relieves gastritis pain. These medications are available in OTC or prescription medications and include Pepcid, Zantac, Axid AR, and Tagamet HB.

Side effects of acid blockers may include:
  • Dizziness
  • Drowsiness
  • Headache (sometimes severe)
  • Tender or swollen breasts in men
  • Insomnia or sleep problems
  • Stomach pain
  • Nausea or vomiting
  • Constipation
  • Diarrhea
  • Impotence
  • Reduced sex drive
  • Difficulty having an orgasm


Antacids help to neutralize stomach acid. Your physician may include these in your treatment plan. While neutralizing stomach acid, they may even provide you with fast pain relief. Side effects of antacids may include diarrhea or constipation, depending on their primary ingredients.

Home and Lifestyle Remedies

You might get some relief from your symptoms if you:

  • Avoid foods you know irritate your stomach, particularly acidic, spicy, fatty or fried foods.
  • Eat smaller and more frequent meals.
  • Avoid alcohol, which can irritate your stomach’s mucous lining.
  • Switch from pain relievers that may increase your chances of gastritis. Your doctor may suggest you take medications like acetaminophen instead of other pain relievers since it’s less likely to irritate your stomach problem.

Your first step is to make an appointment with your doctor if you suspect you have gastritis. They will give you an exam, and if they suspect you have gastritis, they may refer you to a gastroenterologist, which is a digestive disorder specialist.

See how medical marijuana could help relieve your gastritis symptoms. Find patient reviews on local doctors and information on treatment options.