Emergency Medical Minute

Contributor: Aaron Lessen MD Educational Pearls: What is Carbamazepine (Tegretol)? Carbamazepine is an anti-epileptic drug with mood-stabilizing properties that is used to treat bipolar disorder, epilepsy, and neuropathic pain. It functions primarily by blocking sodium channels which can prevent repetitive action potential firing. What are the symptoms of an overdose? Common initial signs include diminished conscious state, nystagmus, ataxia, hyperreflexia, CNS depression, dystonia, and tachycardia Severe toxicity can cause seizures, respiratory depression, decreased myocardial contractility, pulmonary edema, hypotension, and dysrhythmias. How is an overdose treated? An overdose is treated with large doses of activated charcoal and correction of electrolyte disturbances. Be ready to intubate given the potential for respiratory depression. Carbamazepine is moderately dialyzable and dialysis is recommended in severe overdoses. Additional educational pearl: Individuals in correctional facilit