NutriStack
Alcohol and Naproxen, a caution.
Alcohol can compound naproxen's gastrointestinal bleeding risk. Naproxen is among the NSAIDs more strongly associated with upper GI complications, and alcohol adds direct stomach irritation. The combination is higher risk with daily dosing, ulcer history, older age, or any additional antiplatelet or anticoagulant medicine.
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
- Pair type
- Caution
- Evidence (highest tier)
- Strong
- 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 · Strong evidence
Caution
What is happening. Alcohol can compound naproxen's gastrointestinal bleeding risk. Naproxen is among the NSAIDs more strongly associated with upper GI complications, and alcohol adds direct stomach irritation. The combination is higher risk with daily dosing, ulcer history, older age, or any additional antiplatelet or anticoagulant medicine.
Mechanism. Naproxen inhibits COX enzymes and reduces gastric prostaglandin-mediated mucosal protection. Alcohol causes mucosal injury and can turn NSAID-related erosions into clinically significant bleeding.
Recommendation. Avoid heavy alcohol use while taking naproxen. If you need regular naproxen, discuss stomach-protection options and seek urgent care for black stools, vomiting blood, or faintness.
Sources (2)
- 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
- Strate LL, Singh P, Boylan MR, Piawah S, Cao Y, Chan AT. A Prospective Study of Alcohol Consumption and Smoking and the Risk of Major Gastrointestinal Bleeding in Men. PLoS One. 2016;11(11):e0165278. PMID 27824864
Stack Score
How this pair moves the number.
Effect on the composite score
If both Alcohol and Naproxen 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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