I am always confused with depression and attention deficit disorder I cant concentrate on hard or boring subject even before a day of exam , i read only 1 chapter in whole day ,if i forcely try to read then i become tired , fatigue but i have good concentration with some books , some times when driving bike i used to forget the gear in which the bike is running , forgetfulness is only for short term memory I consulted a psychiatrist & he told me that i have depression and G.A.D But on internet i find many things that related to attention deficit disorder So what is the difference btwn depression and a.d.d. in context to lac of concentration and fatigue & forgetfulness to short term memory, i am taking escitalopram and buproprion and it improved my mood but concentration and unmotivation to study is still persist