Schwerta is the trade name for levamlodipine benzenesulfonate tablets, which work the same way. Levamlodipine benzenesulfonate tablets are calcium ion in-flow blockers, which not only block extracellular calcium ions in cardiac muscle and vascular smooth muscle from entering the cells through the calcium ion channels of the cell membrane, but also directly diastole vascular smooth muscle, with anti-hypertensive effect. So clinically the drug is used for the treatment of hypertension and angina pectoris. There are occasional adverse reactions such as headache, dizziness, nausea, abdominal pain, and redness of the face after using the drug. It is contraindicated in patients who are allergic to dihydropyridine calcium antagonists. Pregnant and lactating women should be cautious; elderly patients should use the minimum effective dose when starting the drug. If you need to use the drug, should be used under the guidance of a specialist, not self-medication.