How much blood pressure needs medication, systolic blood pressure is greater than 130mmHg, diastolic blood pressure is greater than 80mmHg, after 1-3 months of low-salt, low-fat diet, exercise and other improvements in lifestyle, the blood pressure is still unchanged, you can start antihypertensive drug therapy. You can start with a small dose first, according to the different degrees of blood pressure, under the guidance of a professional doctor to choose whether you need to combine drugs or choose what type of drugs to apply.