Modalert is of the class of drugs known as NDRIs (non-dopaminergic stimulants). Modalert is a medicine that is used to treat narcolepsy and other sleep disorders such as excessive daytime drowsiness and sleep apnea. To put it simply, modafinil is a wakefulness-promoting eugeroic. It has also been tried for the treatment of Parkinson's disease and multiple sclerosis, but with no noticeable...