Don’t have any medical background, but I worked “8am-8pm work/24h free/8pm-8am/48h free” shifts for 5 years and didn’t have much problem switching to regular 5 day shifts. What I realized too late that those 5 years wrecked my already fragile sleep patterns and 12 hours shifts are too taxing no matter what you are doing.
So I didn’t have your exact situation but I think that switching might be better for your health in the long term in any case.