Modafinil 200mg is an orexin receptor agonist which is meant to treat excessive daytime sleepiness due to specific sleep disorders. It is most often prescribed to adults suffering from narcolepsy, obstructive sleep apnea, and shift work sleep disorder. This drug helps in promoting wakefulness, making people stay awake and alert even when there is too much sleepiness.

Modafinil 200mg can be taken by people suffering from obstructive sleep apnea if the symptoms of their condition are accompanied by excessive sleepiness even with the treatment. In case of shift work sleep disorder, it might also be used to increase the amount of wakefulness in the scheduled hours. Effects may differ in different people.

Modafinil 200mg should only be taken upon recommendation of a physician because it might lead to some side effects like headaches, nausea, nervousness, dizziness, insomnia and others. It also has some interactions with other drugs.