Pharma & Specialty Chemical Standards

Flupirtine, IUPAC name 5-fluoro-2-methyl-1-(2-pyridinyl)-1H-benzimidazole, is a benzimidazole derivative with molecular formula C13H10FN3 (molecular weight 223.25 g/mol). Structurally, it features a fused benzimidazole-pyridine core with a fluorine substituent. Therapeutically, it acts as a centrally acting analgesic for neuropathic and musculoskeletal pain. Physicochemically, it is a white solid with pKa ~6.5, low water solubility, and moderate lipophilicity. Its mechanism involves modulating voltage-gated potassium channels and enhancing GABAergic neurotransmission, though the exact pathway remains partially elucidated. Metabolized hepatically, it exhibits nonlinear pharmacokinetics.