Big effect
IV vitamin C (3 g/day) cut first-day morphine needs by a third after hip replacement — but the overall reduction was 20%, and the finding is brand new
The effect is large and well-measured in a double-blind trial, but because this is one of the first studies on vitamin C for post-surgical pain, the results need replication before they can be considered reliable.
In a randomized, double-blind trial, hip replacement patients who received 3g of intravenous vitamin C daily needed less morphine — about 4 mg vs. 6 mg in the first 24 hours, and 6.6 mg vs. 8.3 mg over the full hospital stay. The vitamin C group also had less pain and better hip mobility. However, this is early evidence, and the treatment was given intravenously in a hospital, so the findings don't directly translate to oral supplements or other situations.
Where this fits in the evidence
This is among the first studies we've indexed on Vitamin C for Reduced Morphine Consumption — treat it as an early signal until more research accumulates.
The study
- Randomized Controlled Trial (RCT)
- 2025-04-09
- Drug design, development and therapy
- PubMed: 40231193
- DOI: 10.2147/dddt.s506262
- Full study breakdown →
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.