No, senna won't knock you out of ketosis.
I think Dulcolax can be a bit on the violent side, IMHO - though admittedly it's always worked for me. Tummy cramps from taking the stuff can be quite something though - never take 2, whatever you do... Were you thinking of Dulco
ease, Starlight?
So, sounds like it's time to pick your laxative of choice. Don't bother with psyllium husks or extra fibre like Fibre 89 until you're un-bunged, cos it'll just make things even worse.
Good luck :cross: