What is the cause of extreme sleepiness?

Sleep deprivation, stress, depression, anemia, thyroid issues, diabetes, chronic fatigue syndrome, and sleep disorders, including narcolepsy and sleep apnea, can all contribute to excessive drowsiness. Poor lifestyle choices and some drugs also have a role. The reason determines the course of treatment; for narcolepsy, for example, stimulants like Modvigil 200 (modafinil) may be administered, but first a medical examination is necessary.

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