Schwerta is the trade name, its generic name is levamlodipine benzenesulfonate, it has the effect of treating angina pectoris and lowering blood pressure, its side effects include edema and headache. 1. Effects: Levamlodipine benzenesulfonate is a dihydropyridine calcium antagonist, its pharmacological mechanism is to inhibit calcium ion inward flow in myocardium and vascular smooth muscle, reduce myocardial oxygen consumption, dilate coronary arteries and peripheral arterioles, so as to play the role of treatment of angina pectoris, relief of myocardial ischemia, lowering blood pressure and so on. 2. Side effects: long-term use of levamlodipine benzenesulfonate can easily cause ankle and foot edema, because the product will dilate the arteries when lowering blood pressure, the blood will flow through the heart to the lower limbs, resulting in blood stasis, which in turn causes lower limb edema; there may also be a faster heart rate, facial flushing, headache, dyspnea and other symptoms. It is contraindicated for those who are allergic to the product, nursing mothers, patients with severe hypotension and heart failure, and is used with caution for those with impaired liver function. The drug should be used in strict compliance with medical advice, if serious symptoms occur during use, the drug should be immediately discontinued and go to a professional hospital to consult a doctor to clarify the cause of the disease and actively cooperate with the doctor’s treatment.