My father is 58 years old, has diastolic bp on higher side around 98, taking medicine, systolic controlled but diastolic always remains high, what shld i ?

HIgh diastolic BP: Most doctors concentrate on the systolic (s) blood pressure as being the more important one. What is your father's systolic bp? Another important thing to know is the pulse pressure (p). That is the difference between the s and the diastolic (d) blood pressure. The wider the p is, the more likely the person will have cardiovascular disease. Ask your father's doctor for more advice.