Sudden increase in blood pressure after taking medication one hour back to normal, this situation is generally not very serious. For hypertensive patients, blood pressure suddenly rises, this situation needs to take antihypertensive drugs in time, such as calcium channel blocker nifedipine extended-release tablets, after taking antihypertensive drugs blood pressure gradually return to normal, this situation is clinically a normal phenomenon, the patient does not need to worry too much. In addition, it is also necessary to promptly exclude the drop in blood pressure caused by other diseases, such as myocardial infarction, tension pneumothorax, pulmonary embolism, infectious shock and so on. If there are other symptoms accompanying the drop in blood pressure, such as chest pain, chest tightness, dizziness, etc., it is recommended that the patient should go to the hospital in time and do the appropriate treatment under the guidance of the doctor. It is recommended that patients with high blood pressure should take antihypertensive drugs regularly and eat a diet with less oil and salt.