I’d try Latuda or Invega as they are more weight friendly.

I gained 20 lbs in 5 weeks on Zyprexa , I was very underweight so my Pdoc was happy, but a no go for me. but I was freezing tubs of cake frosting and eating them and I often looked at my couch wondering if it would taste good.

But I know people who have zero weight gain on Z and it’s a miracle for them.