It was intense stomach pains that brought Dave to his doctors four months ago. Standard medications do not relieve it, smoking more marijuana only seems to worsen it, and some doctors say they are seeing a lot more cases of it. These users are developing a little-understood condition called cannabinoid hyperemesis syndrome that brings on unrelenting vomiting, nausea and stomach pain. The once recreational-use-only drug is now considered by many as a medicine, an anti-nauseant and pain reliever, even an epilepsy medication.īut some long-term “pot heads” are finding the drug they once loved can suddenly turn on them and become almost toxic.