Take antihypertensive drugs, nitrendipine 1 tablet three times a day before physical examination.

You can also eat something else. However, different drugs have different antihypertensive effects on different people, so you should measure your blood pressure before checking. General physical examination will not detect your blood drug concentration, and you can't find out if you take medicine.

There is nothing you can do. If it is really high blood pressure, it should be treated with drugs.