Used in research settings as a selective inhibitor for ion channels, particularly in studies related to pain signaling and neuronal excitability. It helps in understanding the role of specific sodium channels in disease models, making it valuable in the development of new analgesic drugs. Also employed in electrophysiology experiments to block certain voltage-gated sodium currents in cultured cells and tissue preparations. Its dihydrochloride salt form improves solubility and stability in aqueous solutions, facilitating consistent dosing in in vitro assays. Not intended for therapeutic use.