Modafinil belongs to a group of agents promoting arousal. It changes the number of neurotransmitters in the brain and how they work, thus producing the desired effect. Affecting the central nervous system, Modafinil significantly improves many disorders caused by sleep apnea, narcolepsy, and shift worker disorders. It can also improve alertness and concentration, increase attention and cognitive balance, and manage psychological functions.
The average recommended dose for treating narcolepsy, sleep disturbances, and sleep apnea syndrome is 100 mg - 200 mg per day, preferably given in the morning.