Is modafinil a reasonable add-on to a SSRI against unipolar depression? Or would it be risky? I read modafinil itself can cause depression as side effect. And what does modafinil do? How does it feel? Is it stronger than amphetamines or ritalin? And is it addictive? For example when you start taking Moda will you depend on it and have to take it daily? That would suck.