Management of refractory pain in Stiff-Person syndrome.

Stiff-Person syndrome (SPS) is a rare autoimmune neurological disorder characterised by episodic painful muscle rigidity and violent spasms. A significant trigger for the painful spasms experienced by patients is pain itself, making optimal pain management and avoidance a necessity. While first-line and second-line therapies for spasm prevention and termination are known, there is a paucity of evidence to guide pain management. We report the case of a 26-year-old woman with SPS referred for excruciating muscle cramping and rigidity with pain lasting beyond the episodes themselves. We report the novel use of ketamine and intravenous magnesium sulfate which may provide analgesia, spasm avoidance and early termination of exacerbations in SPS.