About this information
This NHS content is written for people in England. Medicine names, availability, prescribing and services may differ in other countries.
Mirtazapine is an antidepressant medicine. It's used to treat depression and sometimes obsessive compulsive disorder (OCD) and anxiety.
It works by increasing the amount of mood-enhancing chemicals called noradrenaline and serotonin in your brain.
Mirtazapine is only available on prescription. It comes as tablets, tablets that dissolve in your mouth or as a liquid that you swallow.
View the original NHS website page ↗. Refreshed 19 August 2026.
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