Thank you for getting in touch with is. As I see, your dad had undergone a bypass surgery
two years back and has been on medication ever since. Medications for BP, diabetes
are usually lifelong and need to be taken regularly. But, it should be noted that over a period of time, the effectiveness of some medicines might decrease. Due to this reason, Doctors often give 2 medicines together for hypertension
and can change to a newer class of anti-hypertensive if the need arises. Therefore, it is important that you consult a Doctor and ask for his advise. Depending on the medicines he takes, the Doctor might prescribe a new medicines or change the dosage. Hope this helped.
Dr. Gagandeep Dhillon