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Lamotrigine for intractable sciatica: correlation between dose, plasma concentration and analgesia.

Elon Eisenberg1, Gassan Damunni, Erica Hoffer

  • 1Pain Relief Unit, Rambam Medical Center, The B. Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel. e_eisenberg@rambam.health.gov.il

European Journal of Pain (London, England)
|October 25, 2003
PubMed
Summary

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Lamotrigine, an antiepileptic drug, effectively reduced sciatic pain in patients with lumbar radiculopathy. The treatment

Area of Science:

  • Neurology
  • Pharmacology
  • Pain Management

Background:

  • Sciatic pain, often linked to lumbar radiculopathy, presents a significant clinical challenge.
  • Current treatments for neuropathic pain have limitations in efficacy and safety.
  • Lamotrigine, an established antiepileptic, has shown potential in managing neuropathic pain.

Purpose of the Study:

  • To evaluate the efficacy of lamotrigine in alleviating sciatic pain.
  • To investigate the relationship between lamotrigine dosage, plasma concentration, and clinical response.
  • To assess the safety profile of lamotrigine in this patient population.

Main Methods:

  • An open-label trial involving fourteen patients with sciatic pain.
  • Lamotrigine dosage was titrated weekly from 25mg to 400mg/day.

Related Experiment Videos

  • Pain assessment included spontaneous pain, Short Form McGill Pain Questionnaire (SFMPQ), Straight Leg Raise (SLR) test, and lumbar spine range of motion.
  • Lamotrigine plasma concentrations were monitored throughout the study.

    • Main Results:

    • Significant improvements in spontaneous pain, SLR test, and lumbar spine mobility were observed at the 400mg dose.
    • A linear correlation was found between lamotrigine dose, plasma concentration, and improvements in spontaneous pain and SLR.
    • No significant correlation was found between lamotrigine levels and SFMPQ scores.

    Conclusions:

    • Lamotrigine demonstrates potential efficacy and safety for treating painful lumbar radiculopathy.
    • The therapeutic effect of lamotrigine appears to be dose- and plasma concentration-dependent.
    • Further research may support lamotrigine as a viable treatment option for neuropathic sciatic pain.