Cataplexy Associated with Narcolepsy
Cataplexy is a sudden, involuntary loss of muscle tone that occurs in people with narcolepsy. An episode can range from a fleeting weakness in the face or knees to a complete collapse of the body, and it is nearly always set off by a strong emotion, laughter, surprise, anger, or excitement. Consciousness is fully preserved throughout, which is what distinguishes cataplexy from a seizure or fainting.
Medicine used to treat Cataplexy Associated with Narcolepsy
What triggers an episode and how long it lasts
Most episodes last only a few seconds to a couple of minutes and resolve on their own. The emotional trigger is the defining feature: a burst of laughter at a joke, a sudden fright, or even anticipation can be enough. Some people notice a mild warning such as facial twitching or drooping eyelids before muscle control gives way.
Because narcolepsy is often under-recognised in Asia, many people live with cataplexy for years before receiving a diagnosis. Sleep specialist services are available in major centres across Singapore, Hong Kong, Japan, South Korea, and India.
Medicines used for cataplexy
The main pharmacological approach is to reduce the frequency and severity of episodes. Clomipramine, a tricyclic agent from the antidepressants category, suppresses REM-related muscle atonia and has been used for cataplexy for several decades. It is typically taken at a low daily dose and may take a few weeks to show full benefit.
If episodes are severe, frequent, or causing injury, a sleep neurologist should be involved in managing the condition alongside any medicines used.