Good question Dina!
What I did was to keep going up until I felt more, rather than less dizzy, which happened pretty quickly - @30mg (which I reached by end of “month 2” of the drug) I became more dizzy not less. I suppose I could have persevered on 30mg and might have got used to it, but I didn’t want to exacerbate the side effects so remained on the minimum I felt was working - 20mg.
Best of luck with it 