MY MOTHER ABOUT 75 YEARS. HAVING GIDDINESS, CHECKED ,ENT, CTSTAN, ETC., NOW SHE IS TAKING VERTIN 16MG TABLET. NOT NO EFFECT. SHALL WE INCREASE IT TO 24 MG. KINDLY ADVICE. SHE ALSO UNDER GONE ANGIOPLAST LAST ONE YEAR BACK. CARDIO DRUGS ARE ALSO SHE IS TAKING