“… 1 Subsequently, several published case reports and case series suggested a class effect of proton pump inhibitors (PPIs) (including omeprazole, pantoprazole, lansoprazole, rabeprazole, and esomeprazole) on the occurrence of acute interstitial nephritis. 2 , 3 , 4 , 5 , 6 Anecdotal case reports received by national drug safety authorities prompted regulators in several countries to urge caution when prescribing PPIs 7 , 8 , 9 , 10 , 11 , 12 ; however, despite these warnings, several studies have shown concerning and continuing levels of inappropriate prescribing of PPIs in both hospital and primary care settings. 13 , 14 , 15 , 16 …”