how effective is modafinil?
<answer> modafinil effects  on intentional sleep deprivation, and modafinil  appears to be effective in reducing the disturbed mood and cognition seen during sleep deprivation with a potency comparable to 20mg D-amphetamine. <context> Some studies assess the effects of modafinil on intentional sleep deprivation, and modafinil (300mg) appears to be effective in reducing the disturbed mood and cognition seen during sleep deprivation with a potency comparable to 20mg D-amphetamine.