Suggest Medication For Severe Migraine

my mother has had a migraine for the last 24+ hours and everytime she eats something when she gets hungry, it gets worse. we think its from eating something with msg in it and all we feed her here is rice porridge made with a LOT of water because it is easy on the stomach. all she can do is drink water and lay in bed. is there anything that might help relieve her pain? she has taken advil twice today and had alka seltzer about 2 hours ago to see if it would help her digest. what can we do to help her?