Anyone successful with Mirtazapine? How long does it take?

I used to be on Amitriptyline 25 mg last year and it took 6 months to work fully (oct 23 - april 24) It healed me 95% completely, it’s like I have a new life

However, after I tapered off it came back (my symptoms are constant nausea) this time, my doctor and I try Mirtazapine which I kinda feel like I shouldn’t have when I was successful with Amitriptyline once

I mean I know it takes time but I rlly don’t wanna lose months over sth that is 50/50, so, I wanna ask yall if anyone was successful or got better from Mirtazapine? If so, how was it? And how long does it take? Or anyone is more successful with Amitrip