Inhibit the decomposition of liver glycogen and gluconeogenesis, reduce the liver's output of glucose; promote the liver's uptake of glucose and the synthesis of liver glycogen; promote the muscle and adipose tissue to take in glucose and amino acids, promote the synthesis and storage of protein and fat; promote the liver to produce very low density lipoprotein and activate lipoprotein lipase, promote the decomposition of very low density lipoprotein; inhibit the decomposition of fat and protein in fat and muscle, inhibit the formation of ketone bodies and promote the utilization of ketone bodies by surrounding tissues.

It has a strong contractile effect on smooth muscles, especially on blood vessels and the basal layer of the uterus; it can cause rhythmic contraction of the uterus to tonic contraction; it can also increase the tension on the intestines and bladder and cause them to contract; it can also inhibit urination.

It is a protein with iron porphyrin as a cofactor that exists in the mitochondria of cells. It is arranged in a certain order to form a cytochrome system. The Fe3 in its molecules can undergo a reversible redox reaction under the action of related enzymes, and is responsible for the transfer of electrons, which is indispensable for cell respiration. When tissues are hypoxic, exogenous agents can enter the cells and play a role in correcting cell respiration and material metabolism.

1. Calcium ion antagonist, regulates calcium ion influx on the membrane of myocardial conduction cells, myocardial contractile cells and arterial smooth muscle cells, without changing serum calcium concentration; 2. Dilates the main coronary arteries and arterioles, antagonizes coronary artery spasm, increases myocardial oxygen delivery, and reduces myocardial oxygen consumption; 3. Prolongs the effective refractory period of the atrioventricular node, slows conduction, and reduces the ventricular rate of patients with chronic atrial fibrillation and atrial flutter; 4. Reduces systemic vascular resistance and thus blood pressure; 5. Reduces afterload, inhibits myocardial contraction, and improves left ventricular diastolic function; 6. Animal experiments suggest that it has a local anesthetic effect, but the effect and dosage in humans are still unclear; 7. Verapamil is not carcinogenic or mutagenic.

This product is a nucleoside antiviral drug, which has an inhibitory effect on type I and type II herpes simplex viruses in vitro. In virus-infected cells, viral thymidine deoxynucleoside kinase phosphorylates this product into penciclovir monophosphate, and then cellular kinase converts penciclovir monophosphate into penciclovir triphosphate. In vitro experiments have shown that penciclovir triphosphate and deoxyguanosine triphosphate competitively inhibit herpes simplex virus polymerase, thereby selectively inhibiting the synthesis and inhibition of herpes simplex virus DNA. The generation of herpes simplex virus mutants resistant to this product is due to changes in the properties of viral thymidine deoxynucleoside kinase or DNA polymerase. The most common acyclovir-resistant virus mutants lack thymidine kinase, and they are also resistant to this product.