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Effects of extremely low frequency electromagnetic fields on morphine analgesia and tolerance in rats.

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Ozdemir E, Demirkazik A, Gursoy S, Taskıran AS, Kilinc O, Arslan G. · 2017

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ELF magnetic fields at 5 mT enhanced morphine effectiveness and reduced tolerance in rats, showing measurable nervous system impacts.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to 50 Hz magnetic fields (household electricity frequency) for 15 days while giving them morphine. The magnetic field exposure enhanced morphine's pain relief and reduced tolerance development. This suggests electromagnetic fields can influence how our nervous systems respond to pain medications.

Why This Matters

This study reveals something fascinating about how ELF magnetic fields interact with our nervous system's pain processing mechanisms. The researchers used 5 mT (milliTesla) magnetic fields, which is significantly stronger than typical household exposures but within the range of some occupational environments and certain consumer devices. What makes this research particularly intriguing is that it demonstrates ELF-EMF can modulate drug effectiveness and tolerance development, suggesting these fields have measurable neurobiological effects. The science demonstrates that electromagnetic fields aren't just passive environmental factors - they actively influence how our nervous system functions. While this particular study focused on morphine, the underlying mechanism suggests ELF exposure could potentially affect other neurological processes and drug responses. This adds another layer to our understanding of why EMF exposure matters for human health.

Exposure Details

Magnetic Field
5 mG
Source/Device
50 Hz
Exposure Duration
30 minutes for 15 days, and a total of four times every 15 minute intervals.

Exposure Context

This study used 5 mG for magnetic fields:

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 5 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the Extreme Concern rangeFCC limit is 400x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 50 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 50 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Study Details

The aim of this study was to investigate the effects of extremely low frequency (ELF) electromagnetic fields (EMF) on morphine analgesia and tolerance in rats.

In the study, 78 adult male Wistar albino rats (approximately 240 ± 12 g) were used. The application...

The maximum analgesic effect of the 5 mT magnetic field was determined on 7 days. Administration of ...

Analgesia test data demonstrated that application of ELF-EMFs to rats increases the morphine analgesia and reduces morphine tolerance.

Cite This Study
Ozdemir E, Demirkazik A, Gursoy S, Taskıran AS, Kilinc O, Arslan G. (2017). Effects of extremely low frequency electromagnetic fields on morphine analgesia and tolerance in rats. Gen Physiol Biophys. 2017 Aug 24. doi: 10.4149/gpb_2017008.
Show BibTeX
@article{e_2017_effects_of_extremely_low_688,
  author = {Ozdemir E and Demirkazik A and Gursoy S and Taskıran AS and Kilinc O and Arslan G.},
  title = {Effects of extremely low frequency electromagnetic fields on morphine analgesia and tolerance in rats.},
  year = {2017},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/28836499/},
}
PubMed: 28836499

Cited By (12 papers)

Quick Questions About This Study

Research shows 50 Hz magnetic fields from household electricity can enhance morphine's pain relief effects. A 2017 rat study found magnetic field exposure increased morphine effectiveness and reduced tolerance development, suggesting electromagnetic fields influence how our nervous systems process pain medications.
Studies demonstrate EMF exposure can influence brain function and nervous system responses. Research found 50 Hz magnetic fields altered how rats responded to morphine, enhancing pain relief and reducing drug tolerance. This indicates electromagnetic fields can modify neurological processes in measurable ways.
The health effects of 50 Hz EMF appear complex rather than simply good or bad. While this frequency enhanced pain medication effectiveness in rats, the broader health implications remain unclear. More research is needed to understand how these electromagnetic fields affect human health long-term.
Magnetic field exposure can reduce drug tolerance development according to research. Rats exposed to 50 Hz magnetic fields showed significantly less morphine tolerance compared to unexposed animals. This suggests electromagnetic fields may influence how our bodies adapt to repeated medication use over time.
Extremely low frequency EMF can enhance pain relief according to animal studies. Rats exposed to 50 Hz magnetic fields experienced stronger morphine analgesia compared to unexposed animals. However, researchers need more studies to determine if these pain-modifying effects occur in humans.