I'm in the same boat. I gained 70lbs on invega because of high prolactin caused by the drug. On Jan 2 I started a low carb diet and lost 15 pounds but plateaued. Because of the plateau I became frustrated and have fallen off the low carb wagon, probably gains ten of the fifteen back.

My only options to switch are latuda (which causes high prolactin) and vraylar (which causes weight gain). I NEED meds to be stable. But I can't be physically healthy on meds. So it's either my mental health or my physical health. Apparently I can't have both.

I completely understand your frustration. I have yet to find a solution. After Easter I'm planning to do low carb again and see if I can get further in my weight loss this time. I'm also going to an endocrinologist to see if there's any way to bring my prolactin down.