Drug comparisons
Quinidine vs Tocainide
Compare Quinidine vs Tocainide antiarrhythmics for heart conditions. Differences in class Ia vs Ib, uses, risks, and why Tocainide is no longer available.
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Clinical context
This comparison is triggered when reviewing older class I sodium-channel blockers for ventricular or atrial arrhythmias.
Bottom line
Quinidine remains available for limited cardiac uses while Tocainide is obsolete due to unacceptable toxicity.
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