Case report from 2012 of a man with stiff person syndrome showing improvement after using THC-CBD spray now referenced in the media in refence to Celine Dion. Nothing conclusive in this N=1 report.

Medical Mythbusting Commentary for December 13, 2022

Source:
Man with stiff person syndrome shows improvement after using THC-CBD spray

Reference:
Successful cannabis derivatives oromucosal spray therapy for a seronegative stiff-person syndrome: a case report.