​Differential diagnosis of hypersomnia

​Differential diagnosis of hypersomnia 
-Kleine – Levin syndrome 
-hypothyroidism 
-depression 
-drugs such as sedatives, opiates 
-primary insomnia ( primary CNS hypersomnolence) 
-nacrolepsy 
-sleep apnea 
-inadequate sleep time (lifestyle) 
-insomnia of any cause limiting night time sleep