Broad-spectrum antiviral drug. It has the effect of inhibiting the growth of multiple viruses such as respiratory syncytial virus, influenza virus, hepatitis A virus, adenovirus, etc. in vitro. After entering the virus-infected cells, the drug is rapidly phosphorylated, and its product acts as a competitive inhibitor of viral synthase, inhibiting inosine monophosphate dehydrogenase, influenza virus RNA polymerase and mRNA guanosine transferase, thereby causing a decrease in intracellular guanosine triphosphate, impairing viral RNA and protein synthesis, and inhibiting viral replication and transmission. It may also have an immune effect and neutralizing antibody effect on respiratory syncytial virus.

Broad-spectrum antiviral drug. It has the effect of inhibiting the growth of multiple viruses such as respiratory syncytial virus, influenza virus, hepatitis A virus, adenovirus, etc. in vitro. After entering the virus-infected cells, the drug is rapidly phosphorylated, and its product acts as a competitive inhibitor of viral synthase, inhibiting inosine monophosphate dehydrogenase, influenza virus RNA polymerase and mRNA guanosine transferase, thereby causing a decrease in intracellular guanosine triphosphate, impairing viral RNA and protein synthesis, and inhibiting viral replication and transmission. It may also have an immune effect and neutralizing antibody effect on respiratory syncytial virus.

Analgesic effect: It is a peripheral analgesic by inhibiting the synthesis of prostaglandins and other substances, and the possibility of central analgesia is not ruled out. Anti-inflammatory effect: It may be effective by inhibiting the synthesis of prostaglandins or other substances that cause inflammatory reactions. Inhibition of lysosomal enzyme release and leukocyte activity may also be related. Antipyretic effect: It may act on the hypothalamic temperature regulation center to cause peripheral vasodilation, sweating and increase heat dissipation to relieve fever. Anti-rheumatic effect: In addition to antipyretic and analgesic, it mainly has anti-inflammatory effects. Inhibitory effect on platelet aggregation: It works by inhibiting platelet prostaglandin cyclooxygenase to prevent the formation of thromboxane A2.

Diuretic effect, increases urinary sodium, potassium, chloride, phosphorus and magnesium ion excretion, reduces urinary calcium excretion; inhibits the reabsorption of sodium chloride in the proximal tubule and the distal tubule, increases Na-K exchange, and increases K secretion; may participate in lowering blood pressure through extrarenal mechanisms; affects renal hemodynamics and glomerular filtration function, leading to a decrease in renal blood flow and glomerular filtration rate.

1. Effects on water and electrolyte excretion: diuretic effect, increased excretion of urinary sodium, potassium, chloride, phosphorus and magnesium, and decreased excretion of urinary calcium; it may increase Na-K exchange in the distal tubule and collecting duct by inhibiting the reabsorption of sodium chloride in the distal tubule anterior segment and the proximal tubule, and increase K secretion. 2. Antihypertensive effect: In addition to diuresis and sodium excretion, there may be extrarenal mechanisms involved in blood pressure reduction, such as increased gastrointestinal excretion of Na. 3. Effects on renal hemodynamics and glomerular filtration function: The reabsorption of water and Na in the renal tubule is reduced, the pressure in the renal tubule is increased, and the macula densa is stimulated through the tubule-glomerular reflex, which increases the secretion of renin and angiotensin in the kidney, causing renal vasoconstriction, decreased renal blood flow, contraction of the glomerular afferent and efferent arterioles, and decreased glomerular filtration rate.