Drug General Information (ID: DDI37OM5PC)
Drug Name			Osimertinib		Drug Info		Fostemsavir		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Egfr Inhibitors				Antiviral Agents
Structure

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

Recommended Action
Management		Caution is recommended if osimertinib is used in combination with other drugs that can prolong the QT interval. ECG and serum electrolytes, including potassium, magnesium and calcium, should be monitored before starting osimertinib therapy and periodically during treatment.

References
1	Product Information. Tagrisso (osimertinib). Astra-Zeneca Pharmaceuticals, Wilmington, DE.