Is sertraline better than mirtazapine for anxiety ?

Hard to say: As you might know, there are many "brands" of anxiety. In my practice, Remeron tends to work well for people who are so anxious they can't sleep at night, as it combats anxiety and is sedating. However, Zoloft (sertraline) tends to be tolerated better and works across most anxiety disorders. Also, psych. treatments often have highly individual responses - so it's more what works for you. Hope that helps!