Drug Interaction Report

Promethazine may interfere with imaging studies done with iobenguane I-123. Let your doctor know you are receiving or have recently received promethazine if you are scheduled for an imaging procedure to detect pheochromocytoma or neuroblastoma (tumors in the nervous system). You may need to stop using promethazine for a certain amount of time before having the procedure. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Ask your doctor before using promethazine together with ethanol (alcohol). This can cause uncontrollable movements, agitation, seizures, severe dizziness or fainting, coma, very deep sleep, irregular heartbeats, and high or low body temperature. Use caution when driving, operating machinery, or performing other hazardous activities, these medicaions may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.