I hear the throat is a lot worse than the rectum, which was nothing.
As to fasting, I have no trouble. On a couple occasions I've gone 18 or
20 hours without eating or drinking even when there was no reason to do so. I was at home and just didn't want anthing.I have to take a pill once a week now, to help replace bone calcium I lost in the preceding few years, with a full glass of water, after not eating for a while (all night?) and 30 minutes before eating, or drinking anything other than water, or lying down. Lying down would let the stuff come back up and damage my throat.
The first few weeks it was okay, but starting in July, I was back to normal and I can barely manage to drink anything first thing in the morning. Even after urinating. Sometimes I pour water in my mouth and it spills out. But when not thirsty, it is easier to drink from a bottle than a water fountain.
I only have 3 more months to go maybe, and I can stop taking this pill.