NutriStack
Febuxostat and Vitamin C, a synergy.
Vitamin C has a modest urate-lowering effect in randomized-trial meta-analyses, while febuxostat is a much stronger urate-lowering medicine. The combination may slightly support serum urate reduction, but Vitamin C is not a substitute for febuxostat and may not meaningfully prevent gout attacks by itself. High doses can cause gastrointestinal upset and may be inappropriate for people prone to kidney stones.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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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
- Febuxostat and Vitamin C
- Pair type
- Synergy
- Evidence (highest tier)
- Moderate
- Source citations
- 3 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Synergy · Moderate evidence
Synergy
What is happening. Vitamin C has a modest urate-lowering effect in randomized-trial meta-analyses, while febuxostat is a much stronger urate-lowering medicine. The combination may slightly support serum urate reduction, but Vitamin C is not a substitute for febuxostat and may not meaningfully prevent gout attacks by itself. High doses can cause gastrointestinal upset and may be inappropriate for people prone to kidney stones.
Mechanism. Febuxostat reduces urate production by inhibiting xanthine oxidase. Vitamin C appears to lower serum urate modestly, likely through uricosuric effects involving renal urate transport, so any benefit is additive but usually small.
Recommendation. Do not replace febuxostat with Vitamin C. If you use Vitamin C, keep the dose moderate and tell your prescriber, especially if you have kidney stones, kidney disease, or persistent gout flares. Continue serum urate monitoring to confirm the treatment target is being reached.
Sources (3)
- Liu XX, Wang XX, Cui LL. Association between Oral vitamin C supplementation and serum uric acid: A meta-analysis of randomized controlled trials. Complement Ther Med. 2021;60:102761. PMID 34280483
- Juraschek SP, Miller ER 3rd, Gelber AC. Effect of oral vitamin C supplementation on serum uric acid: a meta-analysis of randomized controlled trials. Arthritis Care Res (Hoboken). 2011;63(9):1295-1306. PMID 21671418
- Andres M, Sivera F, Falzon L, Buchbinder R, Carmona L. Dietary supplements for chronic gout. Cochrane Database Syst Rev. 2014;(10):CD010156. PMID 25287939
Stack Score
How this pair moves the number.
Effect on the composite score
If both Febuxostat and Vitamin C are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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