Tofranil.... what should i do?

my Pyc Dr. just put me on it.... it is making me extreamly tired and weak... my dad tried Anafranil from his doc.... and he didnt like the effects.... i did some research and found that these 2 meds are under the same cl of depressents .... helps with depression and anxity... but is it worth felling tired? i mean... i have to be able to focus in school! it starts in 2 weeks.... i dont know what do do.... nothing has ever worked better for depression and anxity for me.... but i feel soooo drained all the time... i mean its a struggle just to talk! this **** is like....3x heavier than xanax and ativan *im taking 25mg in the morining, 50mg at night*