Drug General Information (ID: DDI83VHPIJ)
Drug Name			Alfuzosin		Drug Info		Isoprenaline		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Antihypertensive Agents				Cardiotonic Agents
Structure

Mechanism of Alfuzosin-Isoprenaline Interaction (Severity Level: Moderate)
Increased risk of prolong QT interval Click to Show/Hide Mechanism Graph
Drug Name		Alfuzosin				Isoprenaline
Mechanism 1		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 Isoprenaline
Increased risk of ventricular arrhythmias Click to Show/Hide Mechanism Graph
Drug Name		Alfuzosin				Isoprenaline
Mechanism 2		Prolong QT interval				Hypokalemia
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 Alfuzosin and Isoprenaline

Recommended Action
Management		Caution is recommended if beta-2 agonists are used in combination with other drugs that can prolong the QT interval. 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	Product Information. Arcapta Neohaler (indacaterol). Novartis Pharmaceuticals, East Hanover, NJ.
2	Sanders JP, Potter DE, Ellis S, Bee DE, Grant JA "Metabolic and cardiovascular effects of carbuterol and metaproterenol." J Allergy Clin Immunol 60 (1977): 174-9. [PMID: 19514]
3	Whyte KF, Addis GJ, Whitesmith R, Reid JL "The mechanism of salbutamol-induced hypokalaemia." Br J Clin Pharmacol 23 (1987): 65-71. [PMID: 3545273]