Magnesium citrate
"Holy  guacamole   Batman it worked! But boy it was a Journey lol for 4 days I hadn't pooped! I had already taken laxatives, stool softener, a bucket of prunes, fiber pills, other fiber pills and still no poop over the last 4 days! So I called friend that has Gastroparesis and asked her what she takes? She said MC! So here it 7:30 at night and I'm off to the drugstore. I chugged it at 8:43 I immediately wanted to puke after I was done. But I said no to myself I have to keep this down! I managed to get down another bottle of water in addition to the two bottles of water I drank before the MC! So I'm sitting here on the potty reading all the other stories and laughing so hard I shoulda crapped my pants but nope! No poop! An hour later I managed to make it to my bed it's 9:45pm insanely nauseated (I gave up on pushing even though I had the urge to) hoping I can just nap then I won't feel the sickness! Then I get this cold sweat come over me, my hands get all clammy, my head starts hurting, I feel like my heart is about to pop out of my chest, my pulse quickened even worse then it had been, my stomach turns and feel everything come up and I projectile puke like in the exorcist movie and it's going everywhere! It doesn't stop after one puke oh no! We're talking 3 projectile pukes! I can't even move closer to the restroom I just fall to the floor completely weak & out of control all cold and sweaty now just puking and puking! it's everywhere! Then when I stop I immediately feel better as far as the nausea and all those other side effects lol but now I have this huge mess! And still no poop! Plus I'm like great after all that now the MC ain't even gonna work because I puked it all up! Boy was I wrong! Got cleaned up and went to bed! Then about 2:04am I awaken with the urge to fart I run to the potty! And oh ya! It was like I pooped out the titanic or something! Once I was done pooping out the poop the size of a killer whale I wiped washed my hands and was gonna turn off the lights and shut the door then I was like ohhhh boy! I had to run back to the potty lol for an encore performance! 
 I puked it all up lol I thought noway this isn't gonna work now! But it did! Dude I feel like pooped so much my legs hurt from flexing them while trying to push lol my caves n ankles feel like they are about to fall off lol and butt feels raw lol it's now 6:56am and I haven't had to poop again thank goodness. idk where it would come from lol all stool was intact no diarrhea so far!"