Seeing as geodon is often prescribed to help with symptoms of schizophrenia, I would almost be certain that it would work against the effects of LSD. But if you are on geodon, you might want to tread lightly working with psychedelics in the first place. I know a few people diagnosed with schizophrenia who have worked with certain psychedelics to their advantage over time (surprisingly dmt with one person), but I've definitely known more (especially having been a behavioral health counselor) who have had LSD eventually lead (in part at least) to an exacerbation of their symptoms, and for one friend, I've seen him land himself in the e.r. 3 different times due to issues brought out from tripping. I'm actually wondering if some of the 2C's might be a better choice for you to work with due to a less profound "mindfuck" feeling...something to look into if you are certain you want to be working with psychedelics.
I actually read up a little just now on geodon withdrawal symptoms, and they don't seem to be very easy to go through so I wouldn't advice stopping your medication to take LSD. I even read a couple of people saying that even missing one day's worth left them agitated at night and unable to sleep. Everyone is different though, so if you know your reaction to coming off geodon is different, then you might consider it I guess.
Whatever you decide to do though, best of luck to you.
