Heart rhythm drugs worse than no treatment. (quinidine)

HealthFacts | February 1, 1992| | Copyright

People treated with quinidine for abnormal heart rhythms (arrhythmias) are more likely to die of an adverse reaction to the drug than of the condition itself, according to a new meta-analysis* (Circulation, November 1991). It also discovered that quinidine, although widely used for over half a century, may have an even greater risk of causing fatal adverse reactions than two newer, highly toxic antiarrhythmia drugs, encainide and flecainide.

In 1989, a National Institutes of Health (NIH) study found that people given either encainide (brand name: Enkaid) or ...

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