Q2. Correct answer: A. Enteric infection
Rationale
Despite the numerous side effects associated with long-term PPI use, the quality of evidence and risk of confounding from these studies limits the ability to ascribe sufficient cause and effect between PPI use and these outcomes. However, a recent large randomized controlled trial that evaluated the use of pantoprazole versus placebo demonstrated a statistically significant difference between the pantoprazole and placebo groups only in enteric infections (1.4% vs 1.0%; odds ratio, 1.33; 95% confidence interval, 1.01-1.75). Despite a nearly double increased risk of Clostridioides difficile infection in the PPI group, compared with the placebo group, the number of events was low, and the difference did not reach statistical significance. In the context of these data, and more recent studies suggesting an increased risk of COVID-19 in patients who take PPIs, compared with those who do not, the risk of enteric infections is likely small but significantly increased among long-term PPI users.
References
- Freedberg DE et al. Gastroenterology. 2017;152(4):706-15. doi: 10.1053/j.gastro.2017.01.031.
- Moayyedi P et al. Gastroenterology. 2019;157(3):682-91.e2. doi: 10.1053/j.gastro.2019.05.056.
