NutriStack
Calcium and Esomeprazole, a caution.
Esomeprazole reduces absorption of calcium carbonate, which depends on stomach acid to dissolve. Long-term PPI use is associated with a modest but consistent rise in hip, spine, and any-site fracture risk, plausibly mediated in part by reduced calcium uptake. Postmenopausal women and patients on chronic steroids are at greatest concern.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Calcium and Esomeprazole
- Pair type
- Caution
- Evidence (highest tier)
- Strong
- Source citations
- 3 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Strong evidence
Caution
What is happening. Esomeprazole reduces absorption of calcium carbonate, which depends on stomach acid to dissolve. Long-term PPI use is associated with a modest but consistent rise in hip, spine, and any-site fracture risk, plausibly mediated in part by reduced calcium uptake. Postmenopausal women and patients on chronic steroids are at greatest concern.
Mechanism. Calcium carbonate requires gastric acid to ionize Ca2+ for absorption; esomeprazole-induced hypochlorhydria reduces this dissolution. Calcium citrate is acid-independent because it is already in a soluble salt form.
Recommendation. Switch to calcium citrate, which absorbs well in a low-acid stomach, or take calcium carbonate with a meal when residual acid is highest. Ensure adequate vitamin D intake and discuss bone density monitoring if you take esomeprazole for more than a year.
Sources (3)
- Yang YX, Lewis JD, Epstein S, Metz DC. Long-term proton pump inhibitor therapy and risk of hip fracture. JAMA. 2006;296(24):2947-53. PMID 17190895
- Zhou B, Huang Y, Li H, Sun W, Liu J. Proton-pump inhibitors and risk of fractures: an update meta-analysis. Osteoporos Int. 2016;27(1):339-47. PMID 26462494
- Freedberg DE, Kim LS, Yang YX. The Risks and Benefits of Long-term Use of Proton Pump Inhibitors: Expert Review and Best Practice Advice From the American Gastroenterological Association. Gastroenterology. 2017;152(4):706-15. PMID 28257716
Stack Score
How this pair moves the number.
Effect on the composite score
If both Calcium and Esomeprazole are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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