Constipation and in-flight toilet use.
I'm on medication and one of the side-effects is constipation. Extra bran doesn't help too much. This isn't too much of a problem at home as I can take as much time as I require, but what about in flight? I assume I should let the cabin crew know I might require much more time? If so, how? Or should I advise the airline beforehand? Should I have any documentation or will just the medicine suffice?