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Xyrem: highly controlled substance, but it is life-changing for some people when they reach the correct dosage. Reduces REM sleep.
Adderall: temporary fix for the daytime sleepiness. It can help someone not fall asleep or to better be able to focus.
Modafinal:keeps you awake during the day, but gave me massive migraines.
Baclofen: people have said that this medicine helps them sleep.