Calcium blockers (also known as slow channel blockers or calcium antagonists) block the entry of calcium ions across the membrane into myocardial and vascular smooth muscle cells.

Nimodipine is a Ca2 channel blocker that inhibits smooth muscle contraction and relieves vasospasm by preventing Ca2 from entering cells. It has a strong effect on cerebral arteries, is lipophilic and easily penetrates the blood-brain barrier, and can be used to prevent vasospasm after subarachnoid hemorrhage, and may have a protective and memory-promoting effect.

This product is a macrolide antibiotic. Its mechanism of action is similar to that of erythromycin, and its antibacterial spectrum is also similar to that of erythromycin, but its antibacterial activity against most Gram-positive bacteria is slightly worse. Some erythromycin-resistant Staphylococcus aureus are still sensitive to kitasamycin. This product also has considerable activity against diphtheria, tetani, Neisseria gonorrhoeae, pertussis, Rickettsia and Chlamydia trachomatis.

This product is an acetanilide antipyretic analgesic. It inhibits cyclooxygenase and selectively inhibits the synthesis of prostaglandins in the hypothalamic temperature regulation center, leading to peripheral vasodilation and sweating to achieve an antipyretic effect. Its antipyretic effect is similar to that of aspirin. It inhibits the synthesis and release of prostaglandins, etc., increases the pain threshold and has an analgesic effect. It is a peripheral analgesic, weaker than aspirin, and is only effective for mild and moderate pain. This product has no obvious anti-inflammatory effect.