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Health Library

Cannabinoid Hyperemesis Syndrome

(CHS)

Definition

Cannabinoid hyperemesis syndrome (CHS) is severe nausea and vomiting in people who use a lot of cannabis (marijuana). It is rare.

Causes

The cause of CHS is not known.

Risk Factors

You have a higher risk of CHS if you use cannabis more than once a week for more than a year.

Symptoms

People who use cannabis may have:

Attacks of nausea and vomiting

Belly pain

Fear of vomiting

Weight loss

Symptoms that ease after taking a hot bath or shower

Symptoms often get better in 1 to 2 days when cannabis is stopped. They return when you use cannabis again.

Diagnosis

You will be asked about your symptoms and health history. You will also be asked about your use of cannabis. A physical exam will be done. It will focus on your belly. The diagnosis is based on your symptoms and cannabis use.

Treatment

The only way to treat CHS is to stop using cannabis. Your symptoms will come back if you continue to use it.

Talk with your doctor about the best treatment plan for you. Some choices are:

Hot Baths or Showers

Hot baths and showers can ease nausea and belly pain. It can also help you feel hungry again. It is not known why it is helpful. The relief only lasts a short time.

Fluids

You will need to replace fluids lost from vomiting. This can be done by drinking plenty of water or an oral rehydration solution. People who have lost a lot of fluids may need them replaced more quickly. This can be done with IV fluids.

Medication

Medicines used to treat CHS are:

Antiemetics to control nausea and vomiting

Proton pump inhibitors to reduce stomach acid

Capsaicin cream put on the belly to cause a feeling of warmth

Therapy

Therapy can help if there is misuse of cannabis. This includes use that interferes with relationships and day-to-day life.

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.