Hydrogen-Rich Saline Reduced Pain Sensitivity in Rats
Hydrogen-rich saline prevents remifentanil-induced hyperalgesia and inhibits MnSOD nitration via regulation of NR2B-containing NMDA receptor in rats
Research hubs: Brain & Nervous System
This research was done in animals. Results in animals often don't carry over to people.
- Evidence type
- Animal study (rat)
- Authors
- L. Zhang, R. Shu, H. Wang, Y. Yu, C. Wang, M. Yang, M. Wang, G. Wang
- Journal
- Neuroscience
- Year
- 2014
- PMID
- 25241067
- Study Type
- Rat
- Delivery
- Saline (Dissolved)
- Dose
- 10 ml/kg hydrogen-rich saline injected intraperitoneally 10 minutes before remifentanil infusion
- Duration
- 1 weeks
- Outcome
- Positive
- Peer Reviewed
- Yes
- Cited by
- 45 (OpenAlex, as of November 2026)
- Country
- China
TL;DR
Hydrogen-rich saline may help prevent the increased sensitivity to pain caused by the painkiller remifentanil by affecting certain pain-related processes in the spinal cord.
Key Finding
Hydrogen-rich saline prevented pain hypersensitivity in rats after remifentanil exposure by blocking changes in spinal cord pain-signaling proteins and reducing oxidative damage.
Summary
This rat study investigated whether hydrogen-rich saline could prevent a paradoxical pain-sensitizing effect that sometimes occurs after remifentanil (a strong opioid painkiller) is used. Researchers found that hydrogen-rich saline reduced pain sensitivity and blocked changes in spinal cord proteins involved in pain signaling that normally occur after remifentanil use. The findings suggest hydrogen may work by preventing damage from harmful molecules called free radicals.
Practical Takeaway
This is an early-stage rat study showing hydrogen-rich saline may help prevent a known side effect of certain opioid medications. However, these results have not been tested in humans, and the study does not establish whether hydrogen water (a different delivery method) would have similar effects. Much more research is needed before any clinical recommendations can be made.
Abstract (excerpt)
Remifentanil administration may subsequently cause paradoxical hyperalgesia in animals and humans, but mechanisms remain unclear. MnSOD nitration and inactivation caused by generation of reactive oxygen species and activation of NMDA receptors are involved in the induction and maintenance…