Hi again Mirtazapine is definitely more sedating in the lower doses ie 7.5mg and 15mg. when I first went on it I could barely keep awake in the afternoons. I suggest that you go back to your GP for a review of your meds and a medical certificate. I would also ask for a referral to see a psychiatrist as he/she will be better suited to diagnose your illness. Mirtazapine has worked for me in the past although this time it is slow to recognise any change in my mood this time. I am also taking lithium. My psychiatrist also mentioned combining mirtazapine with another ssri which might be an option for you too. I expect that he will want to increase your dose. Best of luck with it and keep posting.