Fenspiride HCl

Fenspiride induces potentiation of the effects of isoprenaline and sodium nitroprusside with logEC50 of 4.1 and 3.5, respectively, in human isolated bronchi. ^[1]

Fenspiride, an antiinflammatory drug with low anti-cyclooxygenase activity, administered orally at 60-200 mg/kg inhibits neutrophil migration into peritoneal and air pouches cavities as well as exudation into peritoneal cavities induced by endotoxin but not induced by carrageenin in the rat. Fenspiride (200 mg/kg) inhibits the release of tumour necrosis factor by stimulated macrophages in a dose-dependent manner in the rat. ^[2] Fenspiride (Topically applied) is found to inhibit the development of sclerotic lesions in myringotomized rats, whereas intraperitoneal injections are ineffective. ^[3] Fenspiride (60 mg/kg) significantly reduces the lipopolysaccharide-induced early rise of tumor necrosis factor concentrations in serum (4.2 ng/mL vs. 2.3 ng/mL) and in the bronchoalveolar lavage fluid (55.7 ng/mL vs. 19.7 ng/mL) of guinea-pigs with endotoxemia. Fenspiride (60 mg/kg) also significantly reduces the lipopolysaccharide-induced primed stimulation of alveolar macrophages, defined as their enhanced release of arachidonic acid metabolites as compared to cells from untreated controls upon stimulation with N-formyl-methionyl-phenylalanine. Fenspiride (60 mg/kg) reduces the increased serum concentrations of extracellular type II phospholipase A2, the intensity of the neutrophilic alveolar invasion and the lethality due to the lipopolysaccharide in guinea-pigs with endotoxemia. ^[4]