Hello, I need help to understand how this antidepressant work for anxiety and potentially will lower my HR/BP. I am suffering from severe anxiety (suspected hyperadrenergic postural orthostatic tachycardia syndrome - hyper pots) which causes my heart rate to increase by 30-50 beats per minute upon standing along with blood pressure increase, and so it's hard for even to even stand because of heart palpitations, fatigue, dizziness etc, and so i lay in my bed for 22-23 hours daily for 8 months, my muscles are GONE, i am only existing. Medicine history story in few sentences: after more than several heart tests year ago, they found nothing except mentioned sinus tachycardia episodes and high blood pressure when anxious, for example it was 170/90 with the heart rate of 120 just sittting and talking to cardiologist cuz of anxiety and body many posture changes, but it's in 40s when i sleep and it varies from 50s to 140s every hour during the day, which cardiologists think relates to anxiety. I decided to go to psychiatrist and so she saw severe anxiety and gave me ssri antidepressant escitalopram which made me a lot worse, my heart rate was 90-100 even when i wanted to go to sleep. Now she wants to put me on mirtazapine and i just can't understand how it can work because its serotonin and norepinephrine reuptaker, so how it will reduce my anxiety if i will have more norepinephrine in my blood, i thought they will block it, not increase it. This is a paradox that i fail to understand, what kind of treatment is that? I am scared that this will increase my anxiety/panic attacks/heart rate/blood pressure just like escitalopram. What were your experiences with it? Thank you!