"Migraine sufferers may develop magnesium deficiency due to genetic inability to absorb magnesium, inherited renal magnesium wasting, excretion of excessive amounts of magnesium due to stress, low nutritional intake, and several other reasons. There is strong evidence that magnesium deficiency is much more prevalent in migraine sufferers than in healthy controls."
"...the fact that magnesium deficiency may be present in up to half of migraine patients, and that routine blood tests are not indicative of magnesium status, empiric treatment with at least oral magnesium is warranted in all migraine sufferers."
Excerpts from " Why all migraine patients should be treated with magnesium" from the Journal of Neural Transmission. May 2012 May
Hi...u will have to talk to ur Dr it may be he/she may want to change the dosage u r on.....
Mayb more testing is next...only ur Dr can advise and encourage what he/she feels is the best course of action.,
Good Luck and keep us posted on what u find out.