This is a bit of a late reply, but here goes.
Anyone here been on Mirtazapine? My doctor put me on it today after Citalopram stopped having too useful an effect and the pills I had for my insomnia weren't doing anything as apparently this one is a bit sleep-inducing. Not come across it before so just wondered if anyone had any experience?
I was on Mirtazapine for a bit, after years of citalopram which I'm not sure was doing that much for me. Mirtazapine was great for a couple of weeks, but made me insanely hungry all the time. After a few weeks I started feeling low again, and the hunger continued. After a few months I was still feeling like crap and was nearly 10kg heavier, so I jacked it in. Discontinuation was much less severe than Citalopram was, apart from a week of having the shits (citalopram withdrawal made me very dizzy, gave me visual disturbances and weird electric shock feelings in my brain). I'm now on Sertaline, another SSRI similar to citalopram and it is working much better for me. The first few weeks of taking it were horrible - I felt really low, constantly thirsty and exhausted - but that began to lift and I honestly feel better than before I started taking them. They're not an amazing cure-all, but they definitely have benefits for me.
However, it seems that the efficacy, side effects and withdrawal symptoms of mentalist drugs varies from person to person much more than other drugs (IMHO, based on little actual evidence). In fact, I want to do my phd on just that - psychopharmacogenomics (which is a fun word to say to people if you want them to stop asking about what you do).