Drug General Information (ID: DDISY9GLXV)
Drug Name			Procainamide		Drug Info		Lopinavir		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Antiarrhythmic Agents				Anti-Hiv Agents
Structure

Mechanism of Procainamide-Lopinavir Interaction (Severity Level: Major)
Increased risk of prolong QT interval Click to Show/Hide Mechanism Graph
Drug Name		Procainamide				Lopinavir
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 Procainamide and Lopinavir

Recommended Action
Management		Coadministration of class IA or class III antiarrhythmic agents with other drugs that can prolong the QT interval should preferably be avoided unless benefits are anticipated to outweigh the risks. 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	Product Information. Norpace (disopyramide). Searle, Skokie, IL.
3	Yamreudeewong W, DeBisschop M, Martin L, Lower D "Potentially Significant Drug Interactions of Class III Antiarrhythmic Drugs." Drug Saf 26 (2003): 421-38. [PMID: 12688833]