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Does Weed Dehydrate You?: Understanding CHS

Have you ever wondered if smoking weed can cause dehydration? While marijuana is known to cause dry mouth, it is not necessarily linked to dehydration. In fact, dehydration is more commonly caused by a lack of fluids in the body, rather than the consumption of weed. However, it’s still important to ensure that you’re drinking enough water when you’re using marijuana, especially if you’re a regular user.

In this blog, we’ll explore the relationship between weed and dehydration, as well as a medical condition called Cannabinoid Hyperemesis Syndrome (CHS), which can lead to dehydration as a result of vomiting. We’ll also look at the symptoms and signs of CHS, and what you should do if you think you might be experiencing it. Let’s dive in!

Does Weed Dehydrate You?

Generally speaking, weed does not cause dehydration. However, smoking marijuana can cause dry mouth, a common sign of dehydration. Marijuana-induced dry mouth is due to a lack of saliva and chemical changes in the mouth. When it’s related to dehydration, it’s the result of not having enough water in the body.

Although there’s no evidence of weed causing dehydration, it’s still a good idea to ensure that there’s enough water in the bloodstream. It’s especially important to hydrate if you’re smoking or using marijuana in any other way that can cause dry mouth.

Which Cannabis Product Causes Dehydration?

There is no specific cannabis product that causes more dehydration than others. The dehydration associated with cannabis use is mainly caused by the dry mouth effect, which can occur with any consumption method, including smoking, vaping, edibles, and tinctures. It’s important to note that dehydration from cannabis use is generally mild and can be easily managed by drinking water or other hydrating fluids. 

Cottonmouth vs Dehydration

Cottonmouth is a common side effect of using cannabis, where your mouth feels dry and sticky. Dehydration, on the other hand, is a medical condition caused by a lack of water in the body. While both can cause dry mouth, there are some differences between the two.

If you have cottonmouth, it is usually a temporary condition that goes away on its own or can be relieved by drinking water or other fluids. In contrast, dehydration is a more serious condition that can cause symptoms such as thirst, dry mouth, fatigue, dizziness, and dark-colored urine. If you are dehydrated, drinking water or other fluids is necessary to restore the body’s fluids and electrolytes.

If you are unsure whether you have cottonmouth or are dehydrated, it is always best to drink water and other fluids to help alleviate the symptoms. If your symptoms persist or are severe, it is important to seek medical attention from a healthcare professional.

Cannabis Hyperemesis Syndrome

Some cannabis users can suffer from Cannabis Hyperemesis Syndrome or CHS. This is a medical condition that causes vomiting, which can lead to dehydration if fluids aren’t replaced quickly. CHS is a rare condition that usually affects daily long-term users of marijuana. It consists of repeated and severe bouts of vomiting.

What is CHS?

CHS is a relatively new condition that’s only recently been identified. It’s thought to be caused by the over-stimulation of the endocannabinoid system in the brain, which can result in nausea and vomiting. The condition is typically seen in people who have been using marijuana for many years, and it usually develops in people who smoke large amounts of cannabis on a daily basis.

CHS Symptoms and Signs

Patients with Hyperemesis cannabinoid syndrome usually develop the following symptoms:

  • Morning nausea and abdominal pain (this can last for months or years)
  • Ongoing nausea
  • Decreased food intake and weight loss
  • Dehydration
  • Intense vomiting

Symptoms withdraw soon after the patient stops consuming marijuana. Then the recovery phase starts and they are able to eat normally again.

I think I have CHS. What should I do?

If you suspect you may have CHS, it is important to speak with a healthcare professional as soon as possible. A healthcare professional can provide you with the proper diagnosis and treatment options. In general, the most effective treatment for CHS is to stop using marijuana to see if symptoms subside. It is also important to ensure that you stay hydrated by drinking plenty of fluids, such as water or an electrolyte solution.

In some cases, your healthcare professional may recommend medication to help manage your symptoms. This can include anti-nausea medication or medication to help reduce inflammation in the digestive system. Additionally, some people find that taking a hot shower or bath can provide temporary relief from nausea and vomiting.

It is important to note that CHS is a relatively new condition and there is still much to learn about it. If you are experiencing symptoms that you believe may be related to CHS, it is important to speak with a healthcare professional who is familiar with the condition and can provide you with the care and support you need.

How many people are affected by CHS?

CHS is still a relatively new and rare condition, so there is limited data on its prevalence. However, some studies estimate that it affects around 2-3% of regular cannabis users. It is important to note that not all cannabis users will develop CHS, and it primarily affects long-term, heavy users.


In conclusion, although weed doesn’t directly cause dehydration, it’s still important to stay hydrated when consuming marijuana. Additionally, it’s important to be aware of the potential side effects of cannabis use, including Cannabis Hyperemesis Syndrome. If you’re experiencing symptoms of CHS, speak to your physician immediately to ensure that you receive the appropriate care and treatment. MMJ Health is here to help with any questions you may have about medical marijuana use, so don’t hesitate to contact us today.