Firstly I was prescribed 10mg, I was suffering from panic attacks and anxiety. I had 2-3 panic attacks within a week or so and I will say, when you experience a panic attack, nobody knows what it is like, unless you have experienced one. My GP upped my dose to 20mg and I have to say fingers crossed I've not had an attack for almost 2 weeks. I take my citalopram usually between 9 and 12 in the morning and I find this helps me sleep at night. Sleeping was always an issue, I tried listening to some hypnotherapy for sleep online, it really does help if you get a quiet moment.