GILURYTMAL

What it isClass IA sodium channel blocker; arrhythmias and Brugada provocation testing.
Why this oneMain modern use: unmasks the Brugada ECG pattern within minutes.
What limits itTesting itself risks proarrhythmia; resuscitation must be available. Not US-approved.
NO BOXED WARNINGS
Principal riskProarrhythmia during the test itself, so it is done with resuscitation available
Defining liabilityProarrhythmia, QT prolongation and AV block requiring continuous ECG
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