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Topiramate in trigeminal neuralgia: a randomized, placebo-controlled multiple crossover pilot study
I Gilron1, S L Booher, J S Rowan
1Pain and Neurosensory Mechanisms Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland 20892-1258, USA.
Clinical Neuropharmacology
|April 18, 2001
Summary
Topiramate showed initial promise for trigeminal neuralgia pain relief in a pilot study. However, further trials are needed as topiramate demonstrated no significant effect in a subsequent confirmatory study.
Area of Science:
- Neurology
- Clinical Pharmacology
Background:
- Trigeminal neuralgia is a debilitating neuropathic pain condition.
- Limited treatment options exist, necessitating exploration of new therapeutic agents.
Purpose of the Study:
- To evaluate the efficacy of topiramate in patients with trigeminal neuralgia.
- To assess the feasibility of a crossover design in a pilot study for this condition.
Main Methods:
- A randomized, double-blind, placebo-controlled, two-period crossover pilot study was conducted.
- Three patients with trigeminal neuralgia were enrolled and completed the study.
- A subsequent confirmatory study with multiple crossovers was performed.
Main Results:
- In the main study, topiramate reduced pain by 31%, 42%, and 64% (p = 0.04).
- However, topiramate showed no significant effect in the confirmatory crossover study.
- Patient recruitment challenges in rare pain conditions highlight the utility of crossover designs.
Conclusions:
- Topiramate's efficacy in trigeminal neuralgia remains uncertain due to conflicting results.
- Multiple crossover designs may be beneficial for studying conditions with fluctuating pain.
- Larger, robust clinical trials are essential to definitively determine topiramate's role in trigeminal neuralgia treatment.
