Magnesium Citrate 100mg twice a day for Migraine Aura (without headache) can it cause stress on colon and also can colon become dependant on it?

Magnesium. Yes, in too high a dose can stress the colon and cause the runs. A brand called "Jigsaw Magnesium" is a safer way to go if you encounter that situation. Peace and good health. Less likely than a laxative to cause dependence but it is psychologically possible.