Cannabis for nausea & vomiting
The antiemetic effects of THC are among the best-documented medical uses — especially for chemotherapy-induced nausea.
THC is strongly antiemetic via CB1 receptors — molecules like dronabinol/nabilone have been approved for decades in many countries. CBD complements via 5-HT1A receptors. For severe nausea (chemo, HIV, palliative), THC-dominant approaches; for everyday queasy stomach, often CBD oil.
How THC and CBD suppress nausea
THC binds CB1 receptors in the brainstem's vomiting centre and dampens the signalling cascade that causes nausea — the basis of dronabinol (Marinol) and nabilone (Cesamet).
CBD acts more indirectly, mainly via 5-HT1A serotonin receptors; effective in animal studies against anticipatory nausea before chemo.
Recommended strains & forms
Chemo nausea: THC-dominant strains like OG Kush, Northern Lights, or high-THCA strains for vaping.
Everyday nausea (travel, upset stomach, hangover): CBD oil 10 % or strains like ACDC, Harlequin.
Legal in Switzerland
Medical THC: prescription-only since August 2022 (no more FOPH permit). See Cannabis prescription Switzerland.
CBD (<1 % THC): freely available, lab-tested and discreetly delivered.
FAQ
Can I take CBD oil for motion sickness?
Yes, many users report a few drops 30 min before travel helps. Effect is mild and non-intoxicating.
Is cannabis better than classic antiemetics?
For treatment-resistant chemo nausea often yes — several trials show cannabinoids equivalent or better than older antiemetics. Effect is comparable to modern 5-HT3 blockers; can be combined.
Can cannabis also cause nausea?
Rarely — through Cannabinoid Hyperemesis Syndrome (CHS) after very high, long-term THC use. Reversible with abstinence.