A 29-year-old patient with narcolepsy reports sudden episode…
A 29-year-old patient with narcolepsy reports sudden episodes of muscle weakness triggered by laughter and surprise. These events have increased in frequency and are interfering with work performance. She denies misuse of substances and has no significant medical comorbidities. She is already using a wake-promoting agent for daytime sleepiness but needs additional treatment specifically for cataplexy. Which medication is MOST appropriate to add?