I feel his pain, I had a double whammy one too!
I have to say, the lack of eating pales to nothing when the laxatives kick in! I had a rhumatology bloods appointment booked the morning before one procedure (can't remember if it was the camera up and down or one of the others) and had to ring them and cancel due to the effects!
The nurses found it hilarious how much I had underestimated the effect, over the counter laxatives it aint haha :)
The procedure isn't so bad, bit uncomfortable but I have to say the the staff were brilliant and I could watch on the screen for the camera up (bit difficult for the other one with a camera shoved down your throat) which was a bit of a distraction.
If he has a poor gag reflex like I do, it might be wise to have him ask for a bowl near after the camera down, just in case, as I threw up a lot when I got out. I really do have a bad gag reflex though. The sedation might not have helped either.