Is it bad for you to be on blood pressure medicine for years?

No, if...... Being on blood pressure medication for years is not bad if you are being treated for high blood pressure. What is bad is having untreated high blood pressure for years. Check with your doctor, and check your blood pressure regularly.
Blood pressure meds. Ling term blood pressure control with medications is less risky than being off medications with poor control. Uncontrolled hypertension can result in stroke, heart failure, and kidney failure.