Dofetilide

It is marketed under the trade name Tikosyn by Pfizer, and is available in the United States in capsules containing 125, 250, and 500 µg of dofetilide. Due to the pro-arrhythmic potential of dofetilide, it is only available by prescription by physicians who have undergone specific training in the risks of treatment with dofetilide. In addition, i...
Found on http://en.wikipedia.org/wiki/Dofetilide

dofetilide

(do-fet´ә-līd) an antiarrhythmic that prolongs the duration of the cardiac action potential and the effective refractory period without affecting conduction velocity; used in the treatment of atrial arrhythmias, administered orally.
Found on http://www.encyclo.co.uk/local/21001
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