We present the case of a young man on maintenance hemodialysis who developed frequent episodes of 'fluttering, racing heartbeats', hot flashes, profuse sweating, anxiety, dizziness, and shortness of breath. These symptoms started approximately 1 month after taking cimetidine 400 mg/day with an occasional extra dose. His workup included a total of 72 h of cardiac monitoring, two-dimensional echocardiogram, and thyroid function tests, all of which were essentially unremarkable. When the drug cimetidine was temporarily discontinued, and on another occasion after the drug was totally withdrawn, the patient noticed marked improvement in his symptoms at 48 h with total resolution on the 5th day after discontinuation. This is the 2nd such case reported in the literature.