I use.both magnesium & fish oil as natural muscle relaxers.

I was using magnesium but it made my IBS much worse. It helped with the constipation but once that was stable I had very bad diahrea it took me more than a week to get the IBS back to 'normal.' It works well for my sister but she doesn't have IBS.

I take 400 mg of magnesium, it has elimenated the muscle cramps but not the break thru pain.

thanks for the warning gabbygail77, I have IBS so I'll look into the side effects first