I Wish I Didn't Have To Take All The Medicines I Take

I really want to get off of one of my antipsychotic medications Latuda, because since I've been on it I've gained 65 lbs and growing.....I am obese I am 5" 4 and I weigh 195lbs. I went to the doctor yesterday and he told me to talk to my psychiatrist about switching meds.....I just want to slowly wean myself off over the next few months. I have a pill case with the days of the week on it and I have cut Mondays and Thursdays pills in half.....and left the rest full pills....I will do this for 2-3 weeks to see if my heart can handle it then I will half another pill for another 2-3 weeks until all of my pills are half. Then I will half them again into quarter pieces and do that for a few weeks then remove one pill at a time over a few weeks monitoring my heart through it all...My schizoaffective disorder has gone dormant all that is left is heavenly angels singing...plus I will also wean myself off of all of the sugar in my coffee and get more active by going for long walks.....Hopefully I will lose the weight then. Baby steps I care about my health I will still be on one antipsychotic medication that I get through injection I am hoping its all I need to keep my heart strong.