The difference between nifedipine extended-release tablets (I), (II) and (III) is as follows: 1, the amount of medicine contained in each tablet of nifedipine extended-release tablets (I), (II) and (III) is different, nifedipine extended-release tablets (I) contain 10mg of medicine per tablet; nifedipine extended-release tablets (II) contain 20mg of medicine per tablet; nifedipine extended-release tablets (III) contain 30mg of medicine per tablet. The clinical situation should be based on the patient’s elevated blood pressure, and whether there are other comorbidities to determine the dosage to be taken by the patient; 2, the time of action is not the same, nifedipine extended-release tablets (I) and nifedipine extended-release tablets (Ⅱ) an oral duration of 12 hours, nifedipine extended-release tablets (Ⅲ) an oral duration of 24 hours; 3, the time of consumption is different, nifedipine extended-release tablets (Ⅰ) and nifedipine extended-release tablets Nifedipine extended-release tablets (Ⅰ) and nifedipine extended-release tablets (Ⅱ) are required to be taken on an empty stomach, nifedipine extended-release tablets (Ⅲ), although the instructions also require that the whole tablet be taken on an empty stomach, but it is not subject to gastrointestinal peristalsis and the pH value of the effect, you can take the whole tablet at other times. Fourth, whether it can be broken to take, nifedipine extended-release tablets (Ⅰ) and nifedipine extended-release tablets (Ⅲ) can not be broken to take, nifedipine extended-release tablets (Ⅱ) some manufacturers of products have a center line, can be broken along the center line and then half of the tablet to take, but can not be chewed. Finally, it should also be reminded that patients taking oral nifedipine should not eat grapefruit at the same time, because grapefruit can prolong the action time of nifedipine drugs. In addition, in the process of applying antihypertensive drugs must be taken under the guidance of the doctor.