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Updated: Jan 5, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
Adverse Effects of Proton Pump Inhibitors-Evidence and Plausibility
Reidar Fossmark1,2, Tom C Martinsen3,4, Helge L Waldum5
1Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Prinsesse Kristinas gate 3, 7006 Trondheim, Norway. reidar.fossmark@ntnu.no.
Proton pump inhibitors (PPIs) are widely used, but concerns about overuse and side effects persist. This review examines combined evidence to assess if PPI use causally links to adverse effects, potentially highlighting underestimated mechanistic data.
Area of Science:
- Pharmacology and Therapeutics
- Gastroenterology
- Drug Safety
Background:
- Proton pump inhibitors (PPIs) demonstrate widespread clinical use.
- Concerns regarding PPI overuse and associated adverse events are prevalent.
- The causal link between PPI use and reported side effects remains uncertain.
Purpose of the Study:
- To review and synthesize epidemiological and mechanistic evidence on the adverse effects of PPI use.
- To evaluate the potential causal relationship between PPIs and adverse outcomes.
- To highlight potentially underestimated mechanistic data in assessing PPI safety.
Main Methods:
- Comprehensive literature review of epidemiological studies.
- Analysis of experimental and mechanistic studies investigating PPI effects.
- Integration of evidence from diverse study designs to assess causality.
Main Results:
- Associations between PPI use and adverse effects are frequently reported in observational studies.
- Mechanistic and experimental data offer insights into biological plausibility for certain adverse effects.
- A combined evidence approach may strengthen the assessment of PPI-related risks.
Conclusions:
- The review underscores the need to consider both epidemiological and mechanistic data for a thorough understanding of PPI adverse effects.
- Further investigation into the causal links between PPIs and specific side effects is warranted.
- Careful consideration of PPI use, balancing benefits against potential risks, is crucial.
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