Tocainide hydrochloride is an orally activesodium channel blocker, it blocks the sodium channels in the pain-producing foci in the nerve membranes. Tocainide hydrochloride is a primary amine analog of lidocaine, can be used for the treatment of tinnitus.
Tocainide (100 mg/kg) effectively suppresses ventricular ectopic activity in unanesthetized dogs with coronary occlusion. Termination of tocainide infusion in both digitalis toxicity and coronary occlusion models results in prompt return of ventricular ectopic activity[1].
[1]. Alpert JS, et al. Chemistry, pharmacology, antiarrhythmic efficacy and adverse effects of tocainide hydrochloride, an orally active structural analog of lidocaine. Pharmacotherapy. 1983 Nov-Dec;3(6):316-23.
[2]. De Luca A,et al.Optimal requirements for high affinity and use-dependent block of skeletal muscle sodium channel by N-benzyl analogs of tocainide-like compounds.Mol Pharmacol. 2003 Oct;64(4):932-45.