Glossary of Terms

GABA-related hypersomnia

GABA-related hypersomnia happens in people who have both:

• A hypersomnia disorder, such as:
  • Idiopathic hypersomnia
  • Narcolepsy type 1 or 2
  • Hypersomnia or narcolepsy associated with another disorder
  • Kleine-Levin syndrome
• A substance in their cerebrospinal fluid (CSF) that makes the effects of GABA stronger, causing sleepiness. Substances that cause sleepiness are called somnogens.

To learn more, visit our “What is GABA?” web page.

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