What is CHS?

Learn about Cannabis Hyperemesis Syndrome (CHS), including symptoms, diagnosis, and IV therapy support in Ottawa.

Cannabis Hyperemesis Syndrome (CHS) is a condition seen in long-term, frequent cannabis users that causes recurring episodes of severe nausea, vomiting, and abdominal pain. Symptoms often develop after many years of regular marijuana use, sometimes appearing a decade or more after use begins.

While cannabis is often known for its effects on the brain, it also interacts with receptors in the digestive system. Over time, chronic exposure may disrupt how the stomach empties and how the digestive tract functions, which can contribute to the persistent nausea and vomiting seen in CHS. Although cannabis is widely used in Canada, only a small percentage of long-term users develop this syndrome.

Source: Cedars Sinai Medical Centre

In recent years, we have started to see an influx of patients with Cannabis Hyperemesis Syndrome. Stress alone can be enough to trigger vomiting in this condition. This condition can sometimes be confused with cyclical vomiting. 

Symptoms of Cannabis Hyperemesis Syndrome

Cannabis Hyperemesis Syndrome (CHS) is characterized by recurrent episodes of severe nausea and vomiting in people who use cannabis regularly over a long period of time. Symptoms often occur in cycles and may worsen over time if cannabis use continues.

Common symptoms include:

  • Persistent or severe nausea

  • Repeated vomiting, often uncontrollable

  • Abdominal pain or cramping

  • Dehydration

  • Electrolyte imbalances

  • Loss of appetite

  • Weight loss

  • Fatigue or weakness

  • Headaches

  • Dizziness or lightheadedness

A hallmark symptom of CHS is temporary relief from nausea and vomiting with hot showers or hot baths, which many patients report using frequently during episodes.

As symptoms progress, ongoing vomiting can lead to significant dehydration and nutrient depletion, which is often why individuals with CHS seek urgent or supportive care. Book an appointment for Cannabis Hyperemesis Syndrome (CHS) treatment Ottawa here.

How Marijuana Affects the Body in Cannabis Hyperemesis Syndrome

Cannabis Hyperemesis Syndrome (CHS) is a condition linked to long-term, frequent marijuana use, but experts are still studying exactly how and why it develops in some individuals. Marijuana has complex effects on the body, particularly on the brain and digestive system, which may help explain the symptoms of CHS. 

In the brain, cannabis is known to help reduce nausea and vomiting, which is why it is sometimes used to manage symptoms related to chemotherapy. However, the effects of marijuana on the digestive tract appear to be very different. In the gastrointestinal system, cannabis may actually trigger nausea, vomiting, and abdominal discomfort, especially with chronic use.

Early or occasional marijuana use may produce anti-nausea effects, but repeated, long-term exposure can cause certain receptors to become less responsive over time. This change may disrupt normal digestive signaling and contribute to the recurrent episodes of severe vomiting seen in people with Cannabis Hyperemesis Syndrome.

It remains unclear why some heavy cannabis users develop CHS while others do not, but ongoing research continues to explore genetic, metabolic, and usage-related factors.

How is Cannabis Hyperemesis Syndrome (CHS) Diagnosed?

Diagnosing Cannabis Hyperemesis Syndrome (CHS) can be challenging because many medical conditions can cause recurrent nausea and vomiting. There is no single test that confirms CHS, so diagnosis is typically made by reviewing symptoms, medical history, and patterns of cannabis use.

A healthcare provider will begin by asking detailed questions about your symptoms, overall health, and long-term marijuana use, followed by a physical exam, including an evaluation of the abdomen. Additional testing is often needed to rule out other possible causes of persistent vomiting, especially conditions that may require urgent medical care.

Depending on symptoms, diagnostic testing may include:

  • Blood tests to check for infection or anemia

  • Electrolyte testing to assess dehydration and imbalances

  • Liver and pancreatic enzyme tests

  • Pregnancy testing, when appropriate

  • Urinalysis to evaluate for infection or urinary causes

  • Drug screening to identify substance-related causes

  • Abdominal imaging, such as X-rays, ultrasound, or CT scans, to look for blockages or structural issues

  • Upper endoscopy to examine the stomach and esophagus

  • Head CT scan if a neurological cause of vomiting is suspected

Because CHS is a relatively recently recognized condition, it may be misdiagnosed or overlooked, sometimes being confused with cyclic vomiting syndrome, which causes similar symptoms. In many cases, a gastroenterologist may be involved in confirming the diagnosis.

CHS is strongly suspected when the following features are present:

  • Long-term, frequent marijuana use (daily or weekly)

  • Ongoing abdominal pain

  • Severe, recurring nausea and vomiting

  • Temporary relief of symptoms with hot showers or baths

  • No other identifiable cause of symptoms

While hot showers providing relief are a notable clue, the only definitive confirmation of CHS is improvement of symptoms after stopping cannabis use. Being open and honest with healthcare providers about cannabis habits is essential for accurate diagnosis and effective treatment.

How IV Therapy Can Support Cannabis Hyperemesis Patients

Cannabis Hyperemesis Syndrome (CHS) treatment Ottawa

At Thrive Wellness & Aesthetics, we help patients in Ottawa, Manotick, and Kemptville manage the symptoms of Cannabis Hyperemesis Syndrome (CHS) with targeted IV therapy treatments. Recurrent nausea and vomiting from CHS can lead to dehydration, electrolyte imbalances, and nutrient deficiencies, making fast and effective support essential. Our IV therapy delivers fluids, electrolytes, and essential vitamins directly into the bloodstream, providing relief when oral intake isn’t possible.

Our CHS supportive care in Ottawa and surrounding areas is designed to help patients feel stabilized and supported during acute episodes. While IV therapy does not cure CHS, it can play an important role in a comprehensive care plan, alongside lifestyle adjustments and cessation of cannabis use.

At Thrive Wellness & Aesthetics, we prioritize safe, professional, and compassionate care. Patients across Ottawa, Manotick, and Kemptville can benefit from IV therapy to replenish fluids, restore electrolytes, and support recovery during CHS episodes.

Book your IV therapy session today in Ottawa, Manotick, or Kemptville and take a step toward symptom relief and overall wellness.

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