Mad honey intoxication is rarely and locally seen, and it can cause cardiac arrhythmias from mild to life threatening health problems. A 52 year-old female patient admitted to our emergency room with dizziness and fatigue after ingestion of bitter honey. On examination in emergency room, her blood pressure was 70/40 mmHg and pulse value was 45/min. Atrial fibrillation and AV complete block rhythm was detected on her Electrocardiography (ECG) recording. She had no history of known-cardiac disease and use of medicine. On follow-up, her general health status got back to normal. The patient was discharged after her medical status was improved. In conclusion bitter honey intoxication can be life-threatening arrhythmias in people after ingestion of it. It is not restricted health problem to only that region of Turkey, but also to worldwide due to increase in people movement and international nutrition transport.