how much do you take the bottle is not much help unless you are so post to drink the whole bottle?

Start with 1/2 bottle unless you know you get the big C often. It works fast and furious once it hits you. If 1/2 bottle has no effect after two hours or so, drink the other half. Make sure you drink 16oz of water after taking the mag citrate so that you don't get dehydrated once it kicks in.

Ok I have a yicky and scarey story on this subject that happened to me 2 days ago. I THOUGHT I was constipated and actually I was impacted. Spent the night in the ER in a VERY compromised situation. I hope this never happens to anyone else. Turns out I was placed on a cough medicine with a side effect of constipation last week so the perfect storm ensued. I am on daily miralax now and will use a more extreme solution if I experience 2 days in a row where I seem to not functioning properly. This situation overcame me with absolutely no cramping or pain. It really freaked me out, but I am fine now!