This interaction with ceftriaxone was not observed with other proton pump inhibitors (PPIs). As a potential mechanism of action, ceftriaxone and lansoprazole were shown to block the hERG potassium channel in patch-clamp electrophysiologic experiments. The exact molecular mechanism remains unclear. It is unknown whether prolonged QTc intervals translates to important outcomes for patients, including ventricular arrhythmia, cardiac arrest, or death.