Jasminstar, I only got constipation after my first EPU. I was fine the other two cycles.

Call me super paranoid (because I am), but I'd still check with my FS about the senekot if it were me. Mostly because I was really surprised when the nurse told me not to use metamucil (I never got around to asking the FS about it though). It's probably fine, but I don't take anything for granted now.