I've not been on citalopram so I'm sure one of the other members can comment on that, but mirtazapine was one of mine and, yes, it's definitely a sedative. There are other ways to treat depression, including counselling and CBT, but the benefit of ADs is they can help support you while you go through these processes.
I would say that All ADs recommended by the NHS are safe, though some people can react to any particular AD in a way that requires immediately ceasing the drug. This is very, very rare. There is a condition called serotonin syndrome which, again, is very, very rare and can be dangerous. I've had it, it was horrible while I was going through it but I'm ok and have no side effects .
If I were you, I would see your GP, advise them you need something that is unlikely to cause drowsiness, and tell them your concerns. Honestly, millions of people in the UK take them, and come to no harm. This link will give you more info
http://www.nhs.uk/conditions/Antidep...roduction.aspx
