Medications that act by sodium channel blockade have various clinical applications. Broadly, they include Vaughn Williams Class 1 antiarrhythmics, local anesthetics, and many medications to treat neuropathic pain, including tricyclic antidepressants (TCA), anticonvulsants, and cocaine. Specific examples include quinidine and procainamide (class 1A antiarrhythmics), lidocaine, mexiletine, and phenytoin (class 1B), flecainide and propafenone (class 1C), carbamazepine and lamotrigine.
Some beta receptor antagonists, such as propranolol and acebutolol, also possess sodium channel blockade properties. Many TCAs exist, and several are still used in clinical practice in the United States. Some insecticides are associated with sodium channel blockade properties. The toxicity of these substances, whether intentional or accidental, can lead to catastrophic effects, including death. Understanding the effective treatment of toxicity and side effects caused by these medications is crucial.
Copyright © 2025, StatPearls Publishing LLC.