How long to get out of your system?

[RichardW]

I was on Mirtazapine 15mg for about 3 months, but increasingly got headaches. I decided to come off it, and went cold turkey. Had one bad day but otherwise pretty easy.

However a week later and I'm still getting headaches. How long before this stuff is out of my system? Starting to panic that the headaches are something else.

[CJH86]

The half life of mirtazapine is around 20-40 hours depending on the person, meaning that 50% of the drug is gone in this period of time, then 75% after another 20-40 hours and so forth. There is likely to still be some in your system after a week and it depends on many different factors, also i should imagine with abrupt withdrawal it may take a while for brain chemistry to return to normal again. Hopefully it'll settle down soon x