Effect heart rhythms: Flecainide is in a group of drugs called class ic anti-arrhythmics. It affects the way your heart beats. Flecainide is used in certain situations to prevent serious heart rhythm disorders. Flecainide may also be used for other purposes not listed in this medication guide. Marijuana with this drug can cause atrial tachyarrhythmias. Decrease effect of flecaidine.
Answered 6/25/2014
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