We report the case of a 60-year-old man who underwent open radical prostatectomy for prostate adenocarcinoma. He had no known cardiac disease or symptoms other than controlled hypertension and remote history of cocaine use. The patient was given sugammadex for reversal of neuromuscular blockade and, within 1 minute, developed severe, drug-resistant bradycardia followed by pulseless electrical activity arrest. Advanced cardiac life support was initiated and continued for 15 minutes before the return of spontaneous circulation. Subsequent cardiac workup showed no abnormalities. We believe the cause of arrest was sugammadex, considering the time of administration, the absence of cardiac disease, and stable operative course.