Nifedipine extended-release tablets are generally recommended to be taken with a meal, while dosage forms such as controlled-release tablets, capsules, and flat tablets are not subject to time restrictions. The active ingredient of nifedipine extended-release tablets is nifedipine, and extended-release tablets are the dosage form of the drug, which means that the drug will be released slowly for a period of time, and the effect of the drug will be slowed down when it is taken with food, so nifedipine extended-release tablets are generally recommended to be taken after meals, which is commonly used for the treatment of chronic stable angina pectoris, angina pectoris, etc. The drug is not allowed to be taken by women during pregnancy and patients who are allergic to nifedipine. Pregnant women and patients allergic to nifedipine extended-release tablets are prohibited from taking them, and common adverse drug reactions after taking the drug include swelling of the feet, ankles and calves, as well as headache, nausea, loss of appetite, constipation and so on. Nifedipine extended-release tablets should be used under the guidance of a physician, it is recommended that patients need to take the drug treatment to the regular hospital cardiology and other related departments for consultation, do not take the drug on their own.