Eperisone hydrochloride

Eperisone hydrochloride (CAS No.: 56839-43-1) is a synthetic small molecule categorized as a centrally active spasmolytic and skeletal muscle relaxant scaffold, commonly positioned in neuromuscular pharmacology and pain related mechanism research as a tool compound for interrogating hyperexcitability and abnormal muscle tone pathways. In biomedical discovery settings, it is primarily studied for functional antagonism of purinergic signaling, with reported selectivity toward P2X7 receptor activity and weaker antagonistic effects at human P2X3, and it is further associated with suppression of reflex driven nociceptive transmission, reduction of excessive skeletal muscle contractile tone, and relaxation of vascular smooth muscle, collectively supporting mechanistic investigation of neuroimmune crosstalk, peripheral sensory signaling, and microcirculatory regulation in nonclinical systems. Available pharmacology descriptions indicate activity in the nanomolar to micromolar range depending on assay format, receptor context, and species background, while detailed potency values are often study dependent and should be confirmed under standardized experimental conditions. The compound is therefore used as a research reagent in cell based receptor assays, electrophysiology or calcium flux paradigms, inflammation linked signaling analyses, and in vivo models of muscle rigidity, mechanically evoked hypersensitivity, or stress induced abnormal muscle tension, where dose and exposure paradigms are selected according to specific protocol design, endpoint sensitivity, and overall research objectives.