is a tetracyclic antidepressant
used primarily in the treatment of depression. Mirtazapine is one of the few noradrenergic and specific serotonergic antidepressants
(NaSSAs). It has been demonstrated to have far less side effects
than most other typical anti-depressants
on the market.
Mirtazapine is unusual for an anti depressant as it has effects that are apparent instantly. The instant effects are sedating, which can help people with sleep, whereas the long term anti depressant/anxiety effects will not become apparet until amounts in the body have built up to a sufficient level over months of use.