"i suffer from anxiety, low mood, and cardiophobia. i started on citalopram which affected my heart (palpitationss, racing, etc.) and so stopped taking it. next in line was sertraline. although this medicine had no side-effects, neither did it help my anxiety. i am now on mirtazapine 15mg nightly. 1st tab i felt like a zombie with bad headache but anxiety symptoms disappeared like magic. 2nd tab i started to feel the palpitations creeping slowly back and just prayed that it was due to the anxiety, although i felt much better. took 3rd tab tonight and the palpitations are definitely back with a vengeance, i feel really groggy and clumsy. i hope the palpitations will decrease over time as this medicine is great for anxiety although no point taking them if they make heart-related anxiety worse."