Used as a non-opioid analgesic in clinical settings, particularly in Russia and some Asian countries, for the management of moderate to severe pain including postoperative and neuralgic pain. It acts on voltage-gated sodium channels, stabilizing neuronal membranes and reducing pain signal transmission. Due to its central analgesic effect with low addiction potential compared to opioids, it is sometimes preferred in long-term pain therapy. Also investigated for antiarrhythmic properties, though its primary use remains in pain control. Requires careful dosing due to narrow therapeutic window and potential neurotoxicity at high levels.