Mirtazapine
"I have had insomnia related to anxiety for about 6 years,  exasperated by shift work and taking Citalopram. Took me ages to fall asleep (some nights couldn't sleep at all and this induced panic attacks) and waking atleast 3 times throughout the night. Finally referred to a sleep disorder service by NHS (uk) and my consultant prescribed this at 15mg. I fall asleep within an hour of taking usually. It has really helped! Feels like a nice natural sleepy state and not overly drowsy like you can get with sleeping pills. Reduced amount of times I wake also. However, I now have cold sweats every morning which wakes me up, they start from around 6am and continue till I wake up. Going to see my doc about this as they are becoming unbearable."