Some experts have theorized that the condition may result from extended overstimulation of endocannabinoid receptors. Researchers have not conclusively identified the cause of cannabinoid hyperemesis syndrome. While no hard statistics exist on how many cases of CHS occur each year, some doctors believe it is increasing and there may be more people affected than realized because patients with milder cases may not even seek medical help. The diagnostic criteria for CHS were ill-defined prior to the establishment of the Rome IV criteria of 2016.2223 Per the Rome IV criteria, all 3 of the following must be met to be diagnosed with CHS.
Study Finds 85% Of Cannabinoid Hyperemesis Sufferers End Up In The ER

“If somebody told me as a lawmaker that I could prevent a third of cases of schizophrenia in my state, why would I not be keenly interested in that policy lever? People who experience cannabis-induced psychosis — hallucinating or suffering delusions after ingesting cannabis — are more likely to develop schizophrenia in the years that follow. “Gen Z people are purchasing more vape pens than any other generation, which is concerning given those are the people at highest risk,” he said. The memo also said sales of high-potency products more than doubled in four years, from less than 14% of the market in 2015 to 37% in 2019. In September, Brandon Danielson was getting ready to go to work, when he had a seizure. He was so severely dehydrated from vomiting that his organs shut down.
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In addition, he described a compulsive pattern of bathing, stating that he often felt nauseated when having bowel movements and had discovered that transitioning directly from the toilet to a hot shower helped resolve his nausea. He described turning the shower temperature to a maximum, noting that it felt as though the hot water washed away his nausea. The patient often required several such showers per day and had been doing this for at least one year.
People with a cannabis addiction may need additional help to make this happen. As marijuana use becomes more legalized, it is possible that CHS will become well-known and more research will be performed to determine the processes that cause it. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. All figures submitted have been created by the authors who confirm that the images are original with no duplication and have not been previously published in whole or in part. In the 1970s, THC concentration in most marijuana would be about 7%, said Dr. Jeff Lapoint, director of the division of medical toxicology at Kaiser Southern California.

Cutaneous problems arise typically from prolonged and excessive exposure to very hot water, heating pads, or hot water bottles. When the receptors are “overloaded” due to persistent cannabis use, Ring explained it can “induce a lot of intestinal spasms,” which is likely what’s causing other symptoms clinicians are seeing such as upper abdominal pain, nausea and vomiting. Often CHS may not be recognized when symptoms first start, and a person may think that using more cannabis will relieve their symptoms, but it will only make them worse. In one of the deaths mentioned above, nausea and vomiting were assumed to be from food poisoning, and not a syndrome related to marijuana use. Medical treatment is essential for anyone experiencing extreme vomiting, since it can cause serious, and even fatal dehydration.
‘I’ve screamed out for death’: Heavy, long-term pot use linked to rare, extreme nausea
Ethics approval was not required as it was a demonstrative vignette, and an exemption was granted from the Baycrest Research Ethics committee. Written informed consent was not required as the presented vignette is demonstrative only and no patients were involved in this case vignette, which was aligned to literature findings and supported by references. Experimental evidence reveals that when pesticides are employed in cannabis culture, up to 70% of their concentration may be recruited into its smoke (Sullivan et al., 2013). Certainly, recognition of the disorder has increased since its initial description, which has paralleled a marked escalation of THC concentrations in cannabis, along with more broad accessibility to those products, as well as synthetic alternatives. Queen said she would vomit repeatedly unless she was in a hot shower — so she’d stay in there for hours.
- Walker said the biggest obstacles they face are the public perception that cannabis is harmless and the struggle to find money to continue their research.
- The most common chemical in cannabis, delta (9)-tetrahydrocannabinol, has neuromodulatory antiemetic effects on CB1 and CB2 cannabinoid receptors.
- Cannabinoid hyperemesis syndrome (CHS) is a very unpleasant — and potentially dangerous — complication of long-term marijuana use.
- The endocannabinoid system plays a role in allostasis of the autonomic nervous system following episodes of stress 55.
- Only 2 RCTs have investigated topical capsaicin and haloperidol use in patients with CHS 22, 32.
Symptoms of Cannabinoid Hyperemesis Syndrome
Awareness of cognitive error is especially important in the context of the increasing prevalence of legalization of tetrahydrocannabinol/marijuana in several states. Superior mesenteric artery syndrome, although rare, is linked to high morbidity and mortality when the diagnosis is delayed; thus, it is crucial to consider it in the differential diagnosis for a patient with weight loss and abdominal pain. By sharing this case, we hope clinicians and patients can become more aware of this rare consequence of tetrahydrocannabinol use to facilitate more comprehensive patient-centered investigations. Notably, however, the patient had been an intermittent, recreational marijuana user for many years prior but had escalated to daily use over the past 2 years for symptom relief, citing the known antiemetic effects of cannabis.
CHS is a potential side effect of prolonged cannabis use, causing major distress to consumers. While synthetic cannabinoids have been accepted as one of the main drugs to relieve N/V, their dosage and duration of administration have not been thoroughly investigated long term. This systematic review alerts the possible outcomes of cannabis use and explores the available management options of CHS. The focus of this review is to stress the importance of rapid recognition, diagnosis, and the available treatment options in adults and older populations. Careful consideration is imperative in older individuals where comorbidities and pharmacological interacts can mask or exacerbate CHS. The novel and highlighted unconventional management options for CHS can be solidified as best practice guidelines with future large-scale research initiatives.
What are the symptoms of cannabinoid hyperemesis syndrome?
- While neem oil and azadirachtin are popular preventative organic pesticide products for cannabis cultivation, they should only be applied pre-flowering.
- This biphasic effect of cannabis is minimally understood but can be reasonably linked to THC dosage.
- The enteric nervous system contains CB1 receptors, which, when activated, can inhibit GI motility by inhibiting the release of those transmitters that cause stomach contractions 47.
- While pesticides are an unlikely explanation for CHS, they may be a contributing factor to symptoms.
Even Mecca Irby, who believed six months ago she was dying from CHS, has cut back but not completely stopped smoking marijuana. The association did not comment on public health concerns related to high-THC products sold legally https://ecosoberhouse.com/ in Washington state, which are at the heart of regulation efforts. The Washington State Liquor and Cannabis Board was unable to provide an exact percentage of the state market for high-potency sales in 2024.
- She had an obscure syndrome called cannabinoid hyperemesis syndrome, a condition only recently acknowledged by the medical community.
- When she picked him up Oct. 21, he felt a little nauseated but had not been vomiting.
- Previously published studies have highlighted the infrequent but serious results of weight loss due to THC-related nausea 4,5.
- Since its founding in 1973, the institute has awarded more than $3.5 million to researchers in 40 UW departments, funding about 350 projects.
It has been suggested that CHS may − in whole or in part − be the result of pesticides, toxins, or other substances accumulated on the plants during growth and harvest 67. Chemical residues on the plant can transfer to mainstream smoke with up to 60 or 70% inhaled via unfiltered glass pipes 68. Cannabis concentrates, made from leftover leaves and other waste products from the plant, are sold to “dab” onto cannabis for smoking; these dabbed-on cannabis extracts may contain 10 times the pesticides of the buds 67, 69, 70. While pesticides are an unlikely explanation for CHS, they may be a contributing factor to what is chs weed symptoms. Five months later, as Denney pored over a coroner’s report for answers, she finally accepted that marijuana had played a pivotal role in her son’s death. The autopsy report, which Denney received in March, attributed her son’s death to dehydration due to cannabinoid hyperemesis syndrome.
Once you stop using marijuana, your CHS symptoms should dissipate within a week or two. However, if you start using the drug again, the symptoms are likely to return. Small what is alcoholism bowel enteroscopy then showed extrinsic duodenal compression in the third portion (Figure 3).

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She expects to see another increase after commercial sales are permitted starting in January. Chalfonte LeNee Queen of San Diego grappled with violent vomiting episodes for 17 years until she found out her illness was related to her marijuana use. Their leading theory, according to the Cleveland Clinic, is that using the drug frequently causes changes to a part of your body called the endocannabinoid system. It doesn’t appear that CHS is caused by marijuana that is laced with other substances, instead, the main factor seems to be how frequently people are consuming THC and how much THC they are consuming. In June, a case study told the story of an anonymous 22-year-old Canadian woman, who after eight years of regular cannabis use, died from heart problems her doctors blamed on CHS.
