Bayxin Tong generic name for nifedipine controlled release tablets, is a calcium antagonist, mainly used for hypertension and coronary heart disease (chronic stable angina). Long-term use of nifedipine controlled-release tablets can occur in the nervous system, vascular abnormalities, digestive system and urinary system abnormalities and other adverse reactions. 1. Nervous system: headache, dizziness, migraine, tremor and other neurological disorders may occur. 2. Circulatory system: Long-term use of nifedipine controlled-release tablets may appear edema, vasodilatation, syncope and other vascular abnormalities. 3. Digestive system: gastrointestinal symptoms such as constipation, gastrointestinal and abdominal pain, nausea, dyspepsia and other gastrointestinal symptoms may occur. In addition, because nifedipine controlled-release tablets have non-deformable substances, patients with severe narrowing of the gastrointestinal tract taking nifedipine controlled-release tablets may also experience intestinal obstruction, gastric stones and other adverse reactions. 4. Urinary system: nifedipine controlled release tablets can also cause renal function damage, which can lead to polyuria, urinary difficulties and other urinary system abnormalities. The use of drugs should be under the guidance of a doctor, do not take or stop taking drugs on your own, need to be adjusted by a doctor to avoid affecting the efficacy of treatment, so that the condition is repeated.