Is weight gain by mirtazapine caused only by appetite being increased?

Or does the medication make you put on water weight aswell?

Hi
I put on 10kg within a month of starting this drug. It was really excessive. I had been told of a diabetes medicine that would help you lose weight. I think the issue is purely down to more eating and being more sedate.
I was taken off the drug after about 6 weeks by my psychiatrist as the weight gain was worse than the positive effects.

Damn, 10 kg? that’s a lot, what dose were you on?

I was on 15mg for about 6 weeks or 2 months. I was really sedated though so I wasn’t moving much and I definitely ate more.
I actually feel well off the drug so it hasn’t impacted me. To be honest my wonder drug was respiridone. But I have other mental health issues but an increase in this worked wonders.

It has increased my appetite slightly but I still consume the same number of calories as before I started it. Nevertheless I have gained at least 10 lbs during the first six weeks of taking it.