Cannabis Education · Harm Reduction

Cannabis, Nausea & “Hyperemesis” – What’s Really Going On?

You may have seen headlines about people showing up in the ER “vomiting from weed.” Here’s what that actually means, without the scare tactics.

Short version

There is a condition often called cannabis hyperemesis syndrome (CHS) – episodes of nausea, vomiting, and belly pain in people who use a lot of high-THC cannabis, very regularly, for a long time. It is much more common in heavy, daily users (especially concentrates and strong THC products) than in occasional, low-dose medical users.

What it usually looks like:

  • Long-term, frequent use of high-THC products (dabs, concentrates, heavy daily flower, etc.)
  • Repeated nausea and vomiting that comes in waves
  • Belly pain
  • People often feel better standing in a hot shower or bath – a classic sign

This doesn’t mean cannabis “suddenly turned on you” after one gummy. It’s more like your body finally saying “enough” after a long stretch of very heavy use.

Good to know: If you drink way too much alcohol, you might vomit. If you push THC way past your limit, day after day, your body can react too. The point isn’t to be afraid of cannabis – it’s to make your use make sense.

What actually helps?

  • In the short term, hot showers, rest, and sometimes medications can help symptoms.
  • If vomiting is severe, people may need IV fluids and monitoring in the ER to treat dehydration.
  • The only reliable “cure” we know of is to take a real break from cannabis, especially high-THC products, and give your body time to reset.

When to seek urgent care:

  • You are vomiting repeatedly and can’t keep down fluids
  • You feel very weak, dizzy, confused, or have a fast heartbeat
  • You see blood in your vomit, have severe chest or belly pain, or you’re just worried something is seriously wrong

Our approach at Green Bridge Society:
We don’t use fear. We use education. If you’re using a lot of high-THC products and are starting to notice cycles of nausea or vomiting – especially if hot showers are the only thing that helps – talk with a medical professional who understands cannabis.

We can help you look at your dosing, product choices, and frequency, and make a plan that actually works for your body.

This page is for education only and is not a substitute for medical care. If you think you are having a medical emergency, call 911 or go to the nearest emergency room.