Thanks for quiery,
it seems that your mother in law is suffering from Migraine
Along with vasograin
she also can take tab. propanolol after consulting your doctor.
Avoid stress,bright light,wearing dark or blue clothes.
Rule out headache due to high blood pressure
Take regular meal,avoid junk food.
If habit of taking alcohol,smoking
Rule out refrection of error or manopausal syndrome.
Ok and bye.