Glossary
Greening out
Acute over-intoxication: nausea, pallor, sweating, racing heart, anxiety, and sometimes vomiting.
It is unpleasant and frightening but not usually dangerous. It passes. Sit down somewhere quiet, drink water, and wait.
Seek medical help for chest pain, difficulty breathing, seizure, or loss of consciousness, or if a child has consumed cannabis.
Edibles are the most common cause because of their delayed onset.
Also written as: green out, too high, whitey.
Related terms
Sources
- Monte AA, Shelton SK, Mills E, et al. Acute Illness Associated With Cannabis Use, by Route of Exposure: An Observational Study. Annals of Internal Medicine. 2019;170(8):531-537.(DOI 10.7326/M18-2809)Accessed 2026-08-15.
- Health Canada. Cannabis: Lower your risks. Modified 2019-06-14.Accessed 2026-08-15.