i was takin mirtazapine briefly for a few weeks recently,i didnt like it so ive switched to amitriptyline,if mirtazapine is making u feel groggy and snappish in the day when uve woken,id reccomend asking to change,i took mirtazapine,it helped with the sleeping which i loved,but i woke up in the fowlest moods ad feel asleep every 2 seconds.Which i cudnt be doing with a two yr old to take care of,and ive never and i mean NEVER got angry and my son,EVER.on mirtazapine,i snapped at him for askin for juice,after than i stopped it straight away.