Dofetilide
From SNPedia
Dofetilide is the generic name for a class III antiarrhythmic agent. It is marketed under the trade name Tikosyn by Pfizer.Wikipedia
A person who developed QT prolongation and torsade de pointes while taking dofetilide carried a rs17221854(T) allele, which may be responsible for those adverse side effects. The rs17221854(T) allele has been reported as associated with long QT syndrome.[PMID 10973849]