NutriStack
Naproxen and Turmeric/Curcumin, a caution.
Concentrated turmeric/curcumin may add antiplatelet activity to naproxen's GI bleeding risk. Naproxen has a relatively strong association with upper GI complications, and curcumin can inhibit platelet aggregation in experimental models. Risk is higher with high-dose curcumin, ulcer history, older age, or other blood thinners.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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At a glance
- Substances
- Naproxen and Turmeric/Curcumin
- Pair type
- Caution
- Evidence (highest tier)
- Emerging
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Emerging evidence
Caution
What is happening. Concentrated turmeric/curcumin may add antiplatelet activity to naproxen's GI bleeding risk. Naproxen has a relatively strong association with upper GI complications, and curcumin can inhibit platelet aggregation in experimental models. Risk is higher with high-dose curcumin, ulcer history, older age, or other blood thinners.
Mechanism. Curcumin inhibits platelet aggregation pathways involving thromboxane formation and calcium signaling. Naproxen reduces gastric prostaglandin protection and can cause erosions or ulcers, so impaired platelet function may worsen bleeding.
Recommendation. Avoid high-dose curcumin supplements with regular naproxen. If you use both, keep naproxen dose and duration low and watch for black stools, vomiting blood, or unusual bruising.
Sources (2)
- Shah BH, Nawaz Z, Pertani SA, Roomi A, Mahmood H, Saeed SA, et al. Inhibitory effect of curcumin, a food spice from turmeric, on platelet-activating factor- and arachidonic acid-mediated platelet aggregation through inhibition of thromboxane formation and Ca2+ signaling. Biochem Pharmacol. 1999;58(7):1167-1172. PMID 10484074
- Castellsague J, Riera-Guardia N, Calingaert B, Varas-Lorenzo C, Fourrier-Reglat A, Nicotra F, et al. Individual NSAIDs and upper gastrointestinal complications: a systematic review and meta-analysis of observational studies (the SOS project). Drug Saf. 2012;35(12):1127-1146. PMID 23137151
Stack Score
How this pair moves the number.
Effect on the composite score
If both Naproxen and Turmeric/Curcumin 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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