Cannabinoid Hyperemesis Syndrome (CHS): Causes, Symptoms, and Treatment

Disclaimer: This article is for informational and educational purposes only, and does not replace expert medical or mental health advice. Cannabinoid hyperemesis syndrome requires immediate medical care. Reach out to your doctor immediately, or call 9-1-1 in the U.S. or your local emergency number in case of emergencies.

Cannabinoid hyperemesis syndrome (CHS) is a condition that is characterized by repeated episodes of severe nausea, vomiting, and abdominal pain in those who use cannabis regularly over a long period of time. Although cannabis is often known for reducing nausea, it can have the opposite effect when used frequently.

In this article, we will explore CHS in detail, the symptoms, and the treatment options.

Cannabinoid hyperemesis syndrome, or CHS, is a disorder linked to chronic cannabis (marijuana) use. It typically develops after years of regular use and is characterized by cycles of intense vomiting and discomfort.

Many people with CHS may not recognize the connection between their symptoms and cannabis use at first, as this condition is not very well known or easily understood. This can delay diagnosis.

Cannabis affects the body in ways that are not yet fully understood, and experts are still working to determine why it leads to cannabinoid hyperemesis syndrome.

CHS happens when chronic cannabis use overstimulates the body’s cannabinoid receptors, especially in the brain and gut. Over time, this disrupts how the body controls digestion, so instead of preventing vomiting, cannabis starts triggering repeated nausea and vomiting cycles.

It is not fully understood why this switch happens, or why only some users develop CHS.

Symptoms of CHS often appear in cycles and may include:

• Persistent nausea, especially in the morning
• Repeated vomiting or retching
• Abdominal pain
• Loss of appetite
• Dehydration from frequent vomiting.

A distinctive feature of CHS is that many people find temporary relief from symptoms by taking hot showers or baths.

Cannabinoid hyperemesis syndrome symptoms occur in three phases:

1. Prodromal Phase

• Mild nausea and stomach discomfort
• Fear of vomiting
• Continued cannabis use, which can sometimes be mistakenly increased to manage nausea.

2. Hyperemetic Phase

• Severe and persistent vomiting
• Intense abdominal pain
• Frequent hot showers for symptom relief
• Possible need for medical care due to dehydration.

3. Recovery Phase

• Symptoms improve after stopping cannabis use
• Normal eating patterns return
• Full recovery may take days to months.

Seek medical care right away if you experience:

• Persistent vomiting
• Not being able to keep food or fluids down
• Signs of dehydration, such as dizziness, dry mouth, and confusion.

Severe dehydration can lead to serious complications if untreated.

There is no single test to diagnose cannabinoid hyperemesis syndrome. Licensed healthcare providers typically make the diagnosis based on:

• Symptoms and medical history
• Chronic cannabis use, typically lasting several years
• Physical tests, like blood tests, urine analysis, abdominal ultrasound, X-ray, CT scan, etc
• Improvement after stopping cannabis.

As CHS symptoms overlap with other conditions, diagnosis may take some time.

The most effective treatment for cannabinoid hyperemesis syndrome is stopping cannabis use completely. Some other treatments will be:

• Medications to control nausea and vomiting
• Using IV fluids to treat dehydration
• Hospitalization for severe cases.

Symptoms often improve within a few days after stopping cannabis; however, a full recovery can take longer.

The only way to prevent cannabinoid hyperemesis syndrome is to avoid or stop using cannabis. Using cannabis after symptoms begin or subside can lead to repeated episodes.

However, this may be difficult to achieve in the case of a substance use disorder. This is where structured care involving behavioral therapies, peer support, relapse prevention, and lifestyle modifications can be helpful in changing the underlying patterns leading to cannabis use for a lasting recovery.

If you are struggling with cannabis use, you do not have to navigate this on your own.

Reaching out to licensed and experienced mental health specialists who can understand what you are experiencing and give clarity on your next steps can make a meaningful difference.

If you are looking for structured care options, partial hospitalization programs and intensive outpatient programs offer intensive care and flexibility so that you can focus on your recovery while staying connected to your daily life.

Call (323) 307-7997.

Can occasional cannabis use lead to cannabinoid hyperemesis syndrome?

Cannabinoid hyperemesis syndrome, or CHS, is most commonly linked to chronic and frequent cannabis use. It is rarely seen in occasional users.

Does switching to cannabidiol (CBD) prevent CHS?

CBD may reduce risk, but products containing even small amounts of THC can still trigger symptoms.

Why do standard nausea medications often not work for CHS?

CHS involves unique cannabinoid-related pathways that do not respond well to typical anti-nausea medications.

How long after quitting cannabis do symptoms stop?

Most people see improvement within days, but full recovery can take several weeks.

Can dehydration from CHS become dangerous?

Severe or prolonged vomiting can lead to electrolyte imbalances and may require emergency care.