Need Diabetic advice. Months or days?

My mother had a minor paralytic attack in december which caused her BP, blood sugar, cholesterol everything on high. Earlier my mother had only thyroid problem for which she is taking thyronorm regularly for last 6 years. Now after taking treatment and regular medicines for more than 6 months, from the last three months her tests reports are absolutely fine & normal and very much positive. But she is taking the medicine regularly as told by doctor. The doctor which we are consulting said that these medicines will continue for next 1 year. Now my question is that from the last 3 months my mother is working fine with no any pain or no any other problem related to diabetic or BP and her tests are also normal (BP , Diabetes everything is normal). Does she have to continue taking her medicines for next few months or days? Please suggest something.