Ranolazine and verapamil are also associated with hERG block and QTC prolongation, but are considered to have low TdP risk due to concomitant inhibition of inward currents that contribute to cardiac APD, including INaL (Belardinelli et al., 2006) and ICaL (Shimizu, 1995; Bourgonje et al., 2013). Here, KCNH2 is linked to torsades de pointes.