Hi buckley and to NMP.
Sorry to hear the mirtazapine is causing you some problems. I was on it in the summer for 9 weeks and came off as it wasn't really doing much of anything for me. However having experienced another bad bout of anxiety my GP has prescribed a combination of mirt and citalopram. I have started the mirt first (been on them 4 days) with a view to adding in the citalopram.
There are a number of people on the forum who do well on this combination - you'll find some helpful posts under the Mirtazapine threads regarding this.
I'm not saying you should combine the two, only you and your GP can decide that - I'm just sharing what has worked for others on here.
Take care
Belle x