Thanks for the reply mrsD.
I'll talk with my doctor about the serotonin test. Could mirtazapine cause a burning sensation? I've been on it since 9/07. Parathesia is a listed possible side effect for mirtazapine but I'm not sure if that includes burning sensations. Also, the clinical pharmacology info states that mirtazapine is a "potent antagonist of histamine receptors". I don't know what this means but could it cause burning?