I used to have regular endoscopies, absolutely detested them but they changed one of my meds to one that targets the guts, no more camera down the throat
Had one in the other end as well, they weren't happy with the result (wasn't clear) so wanted another but my body decided it didn't want to deal with the medical equivalent of the Mr Muscle drain unblocker you have to take, I kept throwing it back up so ended up with a scan instead, much better.