"45 mg.taking this med for depression and anxiety.insomnia is my main issue. mirtazapine doesn&#039;t help with insomnia at all. to me it&#039;s kind of a joke that this actually helps people sleep. i&#039;m very happy for those people. for myself, however, mirtazapine doesn&#039;t work at all for sleep, and if anything, just gets me in this wierd grogged state w/ confusing thoughts and waking up from them constantly. it seems to have a very modest effect on depression and anxiety. it seems that i have had less anxiety overall, and i have random times where i get really depressed and then i snap out of it for an hour or two and attempt productive stuff.but honestly,i think it&#039;s just my own attitude change and not the med.not many noticable bad side fx otherwise"