A case of severe respiratory depression due to cibenzoline overdosage induced by a transient renal dysfunction.

A 69-year-old man was transferred to our hospital because of severe general fatigue and progressive systemic muscle weakness. He had taken 300 mg/day of cibenzoline for his sustained ventricular tachycardia (VT) for years. At the end of June 2001 he began to feel general fatigue, which slowly progressed to systemic muscle weakness and walking disturbance.