Stroke or side effect? dofetilide associated facial paralysis after direct current cardioversion for atrial fibrillation.

Dofetilide is a class III antiarrhythmic drug that has proven efficacious in maintaining sinus rhythm in up to 60% of patients with persistent atrial fibrillation. Dofetilide's most concerning adverse effect is QT prolongation and polymorphic VT, but providers should be aware of other rare significant side effects. We report a case of dofetilide associated Bell's palsy masquerading as stroke that developed shortly after a cardioversion. The patient's facial weakness, a side effect of dofetilide, resolved relatively quickly after discontinuation of the medication and a short course of oral corticosteroids.