What is it?

Hypersomnia is excessive daytime sleepiness, it refers to a condition in which there is difficulty staying awake. People who have hypersomnia tend to fall asleep during the day, at any time of the day, even during driving. Causes for hypersomnia may include sleep disorders such as narcolepsy and sleep apnea, overweight, sleep deprivations, drug or alcohol abuse, head injury, neurological diseases, and depression or other mood disorders. Persistent hypersomnia is when the condition lasts more than 3 months.

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Additional names

This group contains additional names:
- Persistent disorder of initiating or maintaining wakefulness
- Insufficient sleep syndrome

Signs & symptoms

Hypersomnia symptoms may include excessive sleepiness, falling asleep several times during the day, sleeping many hours at night but not feeling rested, and having difficulty waking up from sleep.


Diagnosis of hypersomnia is based upon findings in physical examination and sleep habits review. If the cause for hypersomnia isn’t clear, sleep study may be done, in which the patient spends the night at a sleep center, monitored. Sometimes, other tests may be suggested by the doctor such as blood tests, CT scans and EEG.


Treatment includes lifestyle changes and treatment of the underlying cause, if it exists. Medications that are used to treat hypersomnia include stimulants, antidepressants and some other medications.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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