Long-acting α-receptor blockers (α1, α2) act on postganglionic α-adrenaline receptors to prevent or reverse the effects of endogenous or exogenous catecholamines, causing peripheral vasodilation and increased blood flow. Blood pressure drops slightly when lying down and can drop significantly when standing upright. A drop in blood pressure can reflexively cause an increase in heart rate.

This product is a formyl derivative of tetrahydrofolate, mainly used for the rescue of high-dose methotrexate and other folic acid antagonists. It can be converted into tetrahydrofolate by tetrahydrofolate reductase, which can limit the damage of methotrexate to normal cells and reverse the reaction of methotrexate to bone marrow and gastrointestinal mucosa, but it has no obvious effect on the neurotoxicity caused by methotrexate.

This product is a new type of anti-microtubule drug. It promotes tubulin polymerization, inhibits depolymerization, maintains tubulin stability, and inhibits cell mitosis. In vitro experiments have shown that paclitaxel has a significant radiosensitization effect, which may be to stop cells in the G2 and M phases that are sensitive to radiotherapy. Paclitaxel is a mitotic inhibitor or spindle poison. It has a different mechanism of action from the commonly used chemotherapy drugs. It induces and promotes the assembly of microtubules. Paclitaxel has the effect of polymerizing and stabilizing microtubules, causing rapidly dividing tumor cells to be firmly fixed in the mitotic stage, blocking the replication of cancer cells and causing them to die.

The first generation of oral cephalosporin has good antibacterial effect on most strains of penicillinase-producing and non-penicillinase-producing Staphylococcus aureus, coagulase-negative Staphylococcus, Streptococcus pneumoniae, group A hemolytic Streptococcus, etc. It also has certain antibacterial activity against Escherichia coli, Proteus mirabilis, Salmonella, Shigella, Haemophilus influenzae and gonococci. Methicillin-resistant Staphylococcus, Enterococcus, indole-positive Proteus, Enterobacter, Serratia and other Enterobacteriaceae, Pseudomonas aeruginosa and Bacteroides fragilis are resistant to this product.

The first generation of oral cephalosporin has good antibacterial effect on most strains of penicillinase-producing and non-penicillinase-producing Staphylococcus aureus, coagulase-negative Staphylococcus, Streptococcus pneumoniae, group A hemolytic Streptococcus, etc. It also has certain antibacterial activity against Escherichia coli, Proteus mirabilis, Salmonella, Shigella, Haemophilus influenzae and gonococci. Methicillin-resistant Staphylococcus, Enterococcus, indole-positive Proteus, Enterobacter, Serratia and other Enterobacteriaceae, Pseudomonas aeruginosa and Bacteroides fragilis are resistant to this product.