Magnesium citrate
"I've taken magnesium citrate before and last time it worked in about 40 minutes..this time I took it and its almost been 9 hours and nothing. I am getting real frustrated now

**update- about a half an hour after posting I drank some coffee hoping it would make me poop, about thirty minutes after drinking coffee it finally came, about 9 hours after drinking 10oz magnesium citrate. 10:00pm- 7:00am"