Baixin Tong is nifedipine controlled-release tablets, nifedipine controlled-release tablets can be used in combination with hydrochlorothiazide. Nifedipine controlled-release tablets belong to the calcium antagonist, has the effect of peripheral vasodilatation, made of controlled-release agent can remain effective for 24 hours; for nifedipine treatment effect is not good, especially with cardiac insufficiency patients, can be combined with hydrochlorothiazide, lowering blood pressure at the same time can reduce the cardiac load, not only is conducive to the control of blood pressure, and also can improve the symptoms of heart failure. The adverse reactions of nifedipine controlled-release tablets include facial flushing, tachycardia, dry stools, etc. It is forbidden for pregnant women and lactating women within 20 weeks of pregnancy, patients taking rifampicin, and patients allergic to the drug components. Hydrochlorothiazide belongs to diuretics, the adverse effects of the drug are thirst, dizziness, nausea, vomiting, fatigue, etc. It is forbidden for patients who are allergic to the components of the drug. Nifedipine controlled-release tablets and hydrochlorothiazide are beneficial to the control of blood pressure, in the clinical use of the doctor’s orders, not blindly use the drug, regular review of electrolytes, to prevent the occurrence of hypokalemia.