Modafinil 200mg is a wakefulness-promoting medicine used to help adults manage excessive daytime sleepiness associated with certain sleep disorders. Its established medical uses include narcolepsy, obstructive sleep apnea, and shift work sleep disorder. For people with narcolepsy, it can help reduce excessive daytime sleepiness and support greater alertness during normal activities. In obstructive sleep apnea, modafinil may be used when significant daytime sleepiness continues despite appropriate treatment of the underlying breathing disorder. modafinil . com . au