Magnesium citrate
"Amazing stuff!! I was constipated for over two weeks hardly getting anything out and in constant pain still having to go to work. Tried everything senna, miralax, ducolace and a few enemas. Got a bottle of mag citrate drank it all at once with water 4 or 5 hours later it was the scene from dumb n dumber when loyd got Harry with the turbo lax lol. P.s. I'm 6ft4 210 lb man so one bottle should be plenty for most"