Magnesium citrate
"I haven't pooped in 2 weeks, tried laxatives, enemas, suppositories, nothing helped. Went to my Dr, had an x-ray, was told I was backed up from top to bottom 

( full of $#!the ). Dr said get some Mag Citrate, he didn't say I'd turn into a mud factory.  I've been in the bathroom for 3 hours and still going strong,felling like there's no end in sight. My rear latterly feels like  a ring of fire. 

So yes, it works. Like the Energizer bunny, I keep going and going!!"