Second-generation (“Atypical”) antipsychotics can prolong the QTc interval. Here is the ranking of four very commonly used ones from greatest to lowest propensity to prolong QTc. Ziprasidone Quetiapine Risperidone Olanzapine So, contrary to popular belief, quetiapine is NOT very low in its tendency to prolong the QTc interval. It is less clear as to where exactly…