Sleep & stress · Guide 07
Ganja, hunger and vomiting: the munchies, nausea and when it is serious
Why cannabis brings on hunger, why some long-term users get repeated bouts of vomiting, and the warning signs that need urgent care.
Dr. D.K. Sharma, BAMS5 min read
Can ganja cause hunger, nausea or vomiting?
About 65 seconds to readCannabis often makes people hungry, the "munchies", because THC acts on the brain's appetite signals.1 It can also do the opposite. Some people who use it regularly for a long time develop repeated bouts of severe nausea, vomiting and stomach pain, called cannabinoid hyperemesis syndrome.1 It is easy to miss, because most people expect cannabis to settle the stomach, not upset it.
Urgent signs: Vomiting that will not stop, being unable to keep fluids down, passing very little urine, feeling faint or confused, or blood in the vomit need an emergency department now. The full list is under "When it can't wait".2
Key points
- Hunger after use is common and usually harmless in itself.
- Repeated vomiting in a long-term user can be caused by cannabis itself.1
- Feeling better in a hot shower or bath is a typical clue.
- Vomiting that won't stop can dry out the body and needs a hospital.2
We don't sell cannabis, and this page is not a guide to using it.
Key points from this guide
Each line is quoted word for word from the section it links to.
Contents 10 parts · 5 min
- The short answer
- Why does cannabis cause the munchies?
- What is cannabinoid hyperemesis syndrome?
- Does medical cannabis help with nausea?
- Does ganja settle the stomach, so it cannot be the cause of my vomiting?
- When it can't wait
- When reading is not enough
- What to note before you go
- Questions people ask
- Sources
Why does cannabis cause the munchies?
THC acts on the body's own cannabinoid system, which helps control hunger, so food tastes better and people eat more.1 Regular late-night eating, sweets and fried snacks after use can show up as weight gain and acidity. If heartburn is the problem, see acidity, reflux and GERD.
What is cannabinoid hyperemesis syndrome?
This usually affects people who have used cannabis often, for months or years.1 It tends to come in cycles: a phase of morning nausea and stomach discomfort, then episodes of intense, repeated vomiting and abdominal pain, then a period of feeling well before it returns. Long hot showers or baths often give relief, and some people take several a day. The main lasting answer is stopping cannabis. Symptoms usually settle after that, though it can take time.
Does medical cannabis help with nausea?
In some countries, prescribed medicines made from cannabinoids are used for sickness caused by chemotherapy, under a specialist's care.3 That is not the same as smoking ganja or drinking bhang, which are not tested or measured the same way.3 For a stomach that often feels heavy or slow, see indigestion and low appetite.
Does ganja settle the stomach, so it cannot be the cause of my vomiting?
No, it can be the cause. In some long-term users, cannabis causes repeated vomiting, and the vomiting often returns until they stop.1
When it can't wait
Urgent signs
Go to an emergency department now if vomiting won't stop, you cannot keep fluids down, you are passing very little urine, or you feel faint or confused.2 Go straight away, too, if there is blood in the vomit or it looks like coffee grounds, or the stomach pain is severe.
When reading is not enough
Dr. D.K. Sharma (BAMS) asks about your appetite, digestion, the pattern of nausea and vomiting, and how you use cannabis, and helps decide whether other causes need tests. Consultations are in person in Ludhiana or by video.
To book, send a booking request. The clinic checks that your concern is one it should handle and offers a time. You pay ₹500 and receive written confirmation, and then you consult. Your personalised Dinacharya (daily-routine) guide follows the consultation.
Digestion · Acidity, reflux and GERD · Stopping cannabis: the first weeks
What to note before you go
- How often you use cannabis, and for how long.
- When the nausea or vomiting happens, and how long each bout lasts.
- Whether hot showers or baths ease it.
- Weight change, appetite and what you eat after using.
- Alcohol, other substances and every medicine you take.
Questions people ask
Why do I get so hungry after smoking?
THC acts on the brain's appetite signals, so food smells and tastes better and you eat more.1 It wears off as the effect fades.
Can ganja make you vomit?
Yes. In some long-term regular users it causes repeated bouts of severe nausea and vomiting, called cannabinoid hyperemesis syndrome.1 Vomiting that won't stop needs a hospital.
Why do hot showers help the vomiting?
Hot water eases the symptoms for a while in people with cannabinoid hyperemesis, and doctors see it as a clue to the diagnosis. It does not treat the cause.
Will it stop if I quit?
For most people, yes, the episodes settle after stopping, though it can take some time, and they often return if cannabis is used again.
Sources
- NIDA (NIH). Cannabis (marijuana) DrugFacts. nida.nih.gov.
- NHS. Dehydration. nhs.uk.
- NHS. Medical cannabis (and cannabis oils). nhs.uk.
A source list shows what informed the guide. It is not a sentence-by-sentence review.
Written by Dr. D.K. Sharma, BAMS.
About this guide
- Written by
- Dr. D.K. Sharma, BAMS
- Reading time
- 5 minutes · 941 words
- How we review
- BharatClinic editorial policy
The author link goes to /sexologist-in-ludhiana/, as on the live page. A neutral author profile URL would suit guides on piles and digestion better.
Questions or corrections: drdksharma@bharatclinic.com
