Nifedipine tablets are not recommended in the treatment of high blood pressure, this drug has a relatively fast onset of action, and the metabolic cycle is relatively short, about 4 hours may not have a sustained effect on lowering blood pressure, very unsuitable for people with high blood pressure, which is likely to lead to sudden rise and fall of blood pressure. When people with high blood pressure apply nifedipine preparation, choose nifedipine extended-release tablets or controlled-release tablets, this kind of drug can prolong the duration of nifedipine medication, not to cause the sudden rise and fall of the patient’s blood pressure, and can lower blood pressure smoothly and prevent complications at the same time. Patients should also pay attention to the side effects of nifedipine extended-release tablets or controlled-release tablets, some people may experience headache, angioedema or flushing, etc. If there are similar complications, it is recommended to switch to another antihypertensive drug.