Drug General Information (ID: DDI41GK7CZ)
Drug Name			Fenoldopam		Drug Info		Dronedarone		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Antihypertensive Agents				Group Iii Antiarrhythmics
Structure

Mechanism of Fenoldopam-Dronedarone Interaction (Severity Level: Major)
Increased risk of ventricular arrhythmias Click to Show/Hide Mechanism Graph
Drug Name		Fenoldopam				Dronedarone
Mechanism 1		Hypokalemia				Prolong QT interval
Key Mechanism Factor 1
		Factor Name		Ventricular arrhythmias
		Factor Description		Ventricular arrhythmias are abnormal heart rhythms that cause your heart's lower chambers to pump blood instead of pumping it. This can limit or stop your heart from supplying blood to your body. While some of these arrhythmias are harmless and do not cause symptoms, others can have serious, even fatal, effects on your body.
Mechanism Description		Increased risk of ventricular arrhythmias by the combination of Fenoldopam and Dronedarone
Mechanism 2		Hypomagnesemia				Prolong QT interval
Key Mechanism Factor 2
		Factor Name		Ventricular arrhythmias
		Factor Description		Ventricular arrhythmias are abnormal heart rhythms that cause your heart's lower chambers to pump blood instead of pumping it. This can limit or stop your heart from supplying blood to your body. While some of these arrhythmias are harmless and do not cause symptoms, others can have serious, even fatal, effects on your body.
Mechanism Description		Increased risk of ventricular arrhythmias by the combination of Fenoldopam and Dronedarone

Recommended Action
Management		Caution is advised if dronedarone must be used concomitantly with medications that can cause significant potassium and/or magnesium loss. Serum electrolytes should be evaluated at baseline and at regular intervals throughout the duration of therapy. Any abnormalities should be corrected prior to initiating therapy, and levels should be maintained within the normal range during treatment. Patients should be advised to seek medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, palpitations, or syncope. Dronedarone should be discontinued if QTc Bazett interval increases to 500 ms or greater.

References
1	Product Information. Multaq (dronedarone). sanofi-aventis , Bridgewater, NJ.