Generally, one has to take the medicines, maybe the dosage and the types of medicine can be changed based on the reports and the individuals health status. In rare cases the medicines can be stopped by the doctor but it still needs regular monitoring of the sugar
levels. What is important is to go for regular health check up
and do the investigations as suggested by the doctor from time to time. Please read (from the internet) about Daibetes and it's complications and how to manage it with lifestyle changes and medications. One should not change or stop any medicine without the doctor's advise.