Absolutely a real thing. https://www.hopkinsmedicine.org/-/media/files/allchildrens/clinical-pathways/chs_pathway-2025-08-18.pdf
https://www.gastrojournal.org/article/S0016-5085%2824%2900127-6/
https://jamanetwork.com/journals/jama/fullarticle/2824833
https://gastro.org/clinical-guidance/diagnosis-management-of-cannabinoid-hyperemesis-syndrome/
https://my.clevelandclinic.org/health/diseases/21665-cannabis-hyperemesis-syndrome