Drug General Information (ID: DDIS0J1ZYQ)
Drug Name			Alfuzosin		Drug Info		Tetrabenazine		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Antihypertensive Agents				Nephropathic Cystinosis Therapy
Structure

Mechanism of Alfuzosin-Tetrabenazine Interaction (Severity Level: Moderate)
Increased risk of prolong QT interval Click to Show/Hide Mechanism Graph
Drug Name		Alfuzosin				Tetrabenazine
Mechanism		Prolong QT interval				Prolong QT interval
Key Mechanism Factor 1
		Factor Name		QT interval
		Factor Description		Long QT syndrome is a heart signaling disorder that can cause a fast, chaotic heartbeat (arrhythmia). Many people may not exhibit symptoms, and usually the condition is detected during routine medical tests. In others, the most common symptoms include: sudden fainting, palpitations, dizziness, seizures, sudden death.
Mechanism Description		Increased risk of prolong QT interval by the combination of Alfuzosin and Tetrabenazine

Recommended Action
Management		Coadministration of tetrabenazine with other drugs that can prolong the QT interval should generally be avoided. Caution and clinical monitoring are recommended if concomitant use is required. Patients should be advised to seek prompt medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, lightheadedness, fainting, palpitation, irregular heart rhythm, shortness of breath, or syncope.

References
1	Canadian Pharmacists Association.
2	Cerner Multum, Inc. "Australian Product Information.".
3	Cerner Multum, Inc. "UK Summary of Product Characteristics.".
4	Product Information. Xenazine (tetrabenazine). Prestwick Pharmaceuticals Inc, Washington DC, VA.
5	EMA. European Medicines Agency. European Union "EMA - List of medicines under additional monitoring.".