It dilates vascular smooth muscles (especially those of veins and venules), causing a slight drop in blood pressure, a decrease in the amount of blood returning to the heart, a decrease in cardiac output, a reduction in cardiac workload, and a decrease in myocardial oxygen consumption. In addition, it can dilate coronary arteries, promote collateral circulation, improve blood distribution in ischemic myocardium, and increase exercise tolerance. It has a rapid and lasting effect. Its mechanism of action is to prevent the influx of extracellular calcium ions.

This product has central and peripheral antitussive effects, and its antitussive effect strength is about 1/3 of codeine. In addition to having a direct inhibitory effect on the respiratory center of the medulla oblongata, it also has a mild atropine-like effect. It can relax spasmodic bronchial smooth muscles and reduce airway resistance.

This product has central and peripheral antitussive effects, and its antitussive effect strength is about 1/3 of codeine. In addition to having a direct inhibitory effect on the respiratory center of the medulla oblongata, it also has a mild atropine-like effect. It can relax spasmodic bronchial smooth muscles and reduce airway resistance.

This product has central and peripheral antitussive effects, and its antitussive effect strength is about 1/3 of codeine. In addition to having a direct inhibitory effect on the respiratory center of the medulla oblongata, it also has a mild atropine-like effect. It can relax spasmodic bronchial smooth muscles and reduce airway resistance.

This product has central and peripheral antitussive effects, and its antitussive effect strength is about 1/3 of codeine. In addition to having a direct inhibitory effect on the respiratory center of the medulla oblongata, it also has a mild atropine-like effect. It can relax spasmodic bronchial smooth muscles and reduce airway resistance.

This product has central and peripheral antitussive effects, and its antitussive effect strength is about 1/3 of codeine. In addition to having a direct inhibitory effect on the respiratory center of the medulla oblongata, it also has a mild atropine-like effect. It can relax spasmodic bronchial smooth muscles and reduce airway resistance.

This product has central and peripheral antitussive effects, and its antitussive effect strength is about 1/3 of codeine. In addition to having a direct inhibitory effect on the respiratory center of the medulla oblongata, it also has a mild atropine-like effect. It can relax spasmodic bronchial smooth muscles and reduce airway resistance.

This product has central and peripheral antitussive effects, and its antitussive effect strength is about 1/3 of codeine. In addition to having a direct inhibitory effect on the respiratory center of the medulla oblongata, it also has a mild atropine-like effect. It can relax spasmodic bronchial smooth muscles and reduce airway resistance.

This product is an anticholinergic drug, which has a strong relaxant effect on bronchial smooth muscle and has an antiasthmatic effect on chronic obstructive pulmonary disease. Its effect is more obvious, quick onset and long duration. This product also has the function of controlling the secretion of mucus glands and improving ciliary movement, thereby reducing sputum obstruction to improve ventilation. At the same time, the reduction of sputum also alleviates bronchospasm caused by bronchial stimulation. Compared with beta;-adrenergic receptor stimulants (such as isoproterenol), this product has less side effects on cardiovascular, and compared with beta;2-receptor stimulants (such as salbutamol), this product has a stronger regulatory effect on sputum volume.

This product is a disinfectant and preservative. Its mechanism of action is to denature and kill bacterial proteins, and it has a killing effect on bacteria, fungi, and viruses.