In addition a complete medical history and physical examination, diagnostic procedures may include:
- Combination of EDS and cataplexy provide for preliminary clinical diagnosis
- Laboratory tests to confirm diagnosis and plan treatment, including:
- Overnight Polysomnogram (PSG) - to determine the presence of EDS and perhaps other underlying causes of this symptom.
- Multiple Sleep Latency Test (MSLT) - to measure sleep onset and how quickly rapid eye movement REM sleep occurs.
- Genetic Blood Test - to measure certain antigens often found in people who have a predisposition to narcolepsy.