Mirtazapine
"Had a problem with anxiety after a major surgical complication. Doctor 1st tried a SSRI (Escitalopram). Wow, HUGE increase in anxiety and a full on panic attack. No previous psych history before this. Had to stop after 3 doses. Once I settled down tried some mirtazapine at low dose (7.5 mg). Now we're talking! Almost immediate relief of anxiety and no side effects at all!

Here's a tip. Mirtazapine can be very sedating in some due to its anti-histamine effect. 1st try 50 mg of Benadryl in the daytime on a day you can afford to crash if needed. If the Benadryl zonks you avoid mirtazapine; if you aren't too sedated it is worth a try."