Research study · Der Nervenarzt · 2026
Das Cannabinoid-Hyperemesis-Syndrom - ein narratives Review
Verified on PubMed Oxford CEBM Level 2B: Clinical Cohort Study
A 2026 review in Der Nervenarzt tested cannabinoids in vomiting. The review does not test a treatment, so it cannot say that any treatment works for certain. This review establishes that a cannabis-linked pattern of severe vomiting is a recognised condition, and that doctors should consider it, especially in people who keep using cannabis.
In plain language
Study overview
This is a review article written by a German psychiatrist that looks at a condition in which people who use cannabis regularly suffer repeated, severe bouts of vomiting. It pulls together reports from other doctors about who gets it, how it is diagnosed, and how it has been treated.
Findings
The review does not test a treatment, so it cannot say that any treatment works for certain. It reports that the only way the condition goes away is for the person to stop using cannabis for a long time, while hot showers, baths and some hospital medicines can ease an attack for a short while.
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The deeper readScientific analysis
Hintergrund: Bis vor 25 Jahren waren zyklische Brechattacken unter chronischem Cannabiseinfluss nahezu unbekannt. Nach der Legalisierung nichtmedizinischen Cannabis in Nordamerika und der damit einhergehenden Zunahme des Cannabiskonsums, einschließlich hochpotenter Sorten, steigt dort die Zahl der Patienten mit cannabisbezogenem zyklischem Erbrechen. Die ROME-IV-Kriterien definieren das cannabisinduzierte zyklische Erbrechen inzwischen als Cannabinoid-Hyperemesis-Syndrom (CHS). Methode: Selektive Übersichtsarbeit. Ergebnisse: Das CHS wird am häufigsten in den Notaufnahmen registriert. Eine eindeutige Differenzierung von CHS und Cyclic-vomiting-Syndrom (CVS) ist nur durch Feststellung einer Vollremission während einer 6- bis 12-monatigen Cannabisabstinenz möglich. Heißes Duschen und Baden sowie Haloperidol i.m. (5 mg) können das schwere Erbrechen akut lindern. Eine Einreibung des Abdomens mit 0,1%iger Capsaicincreme wirkt antiemetisch, jedoch weniger schnell. Diskussion: In ROME-IV gilt das CHS als spezielle Variante des CVS. Heilung ist nur durch anhaltende Cannabisabstinenz zu erreichen.
The paper
Citation
Bonnet U Das Cannabinoid-Hyperemesis-Syndrom – ein narratives Review. Der Nervenarzt (2026). PubMed 40689972 · DOI
Limitations the authors noted
Selective literature search in PubMed only; no systematic methodology. Relies largely on case reports, case series and observational studies with high risk of bias. Author's own observations and GRADE assessments are not formally derived. Prevalence and causality estimates drawn from heterogeneous sources. Author declares conflict of interest relating to guideline authorship and pharmaceutical lectures.
In practice
Why this matters
This review establishes that a cannabis-linked pattern of severe vomiting is a recognised condition, and that doctors should consider it, especially in people who keep using cannabis. It is a summary of case reports and observational studies rather than a trial, so it cannot prove how common the condition is or which treatments reliably help. Readers should take from it that stopping cannabis is the only proven cure, and that the evidence for the rest of the advice is thin and still open to question.
Frequently asked questions
Clinical Questions & Answers
What were the primary clinical findings regarding Antiemetics and Vomiting?
The review does not test a treatment, so it cannot say that any treatment works for certain. It reports that the only way the condition goes away is for the person to stop using cannabis for a long time, while hot showers, baths and some hospital medicines can ease an attack for a short while.
What study limitations or clinical safeguards should patients keep in mind?
Selective literature search in PubMed only; no systematic methodology. Relies largely on case reports, case series and observational studies with high risk of bias. Author's own observations and GRADE assessments are not formally derived.
Browse related research
Condition: Vomiting Topic: Antiemetics Topic: Cannabinoids Topic: Haloperidol
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Reviewed by Dr. Caplan on November 1, 2026.
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