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Presented by Mark Rowbotham, M.D. at the Anesthetic and Life Support Drugs Advisory Committee Meeting on May 16, 2002. The result of the coin toss: Michael-lumpier, Bob-splitter.
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Presented by Mark Rowbotham, M.D. at the Anesthetic and Life Support Drugs Advisory Committee Meeting on May 16, 2002
Neuropathic pain:Is it all the same from a treatment perspective?Michael C. Rowbotham, M.D.UCSF Pain Clinical Research Center
Neuropathic Pain Types • Central pain • Post-stroke (or mass lesion) • Spinal cord injury • Multiple sclerosis • Peripheral neuropathy (distal symmetric) • Diabetic • HIV related • Chemotherapy related • Inherited • Other acquired • Post-herpetic neuralgia • Trigeminal neuralgia • Focal peripheral nerve injury • Anesthesia dolorosa RSD/CRPS 1 ?????
Problems with splitting • Response different? PROVE IT! • i.v. lidocaine • Tricyclics/ADs • opioids • anticonvulsants • topicals • ‘Pure’ neuropathic? Yes and No • Spinal cord injury? • Multiple sclerosis • Back/neck w/radiculopathy • Diagnostic certainty? Not always • Different mechanisms? Broad overlap
Clinical Trials Issues • Want to encourage study of a broad range of disorders • Prevalence • Concomitant medical disorders • Inhomogeneity within the diagnosis • Responsivity of disorders may vary • Central pain - low response rates • Diabetic neuropathy - high placebo response • PHN - allodynia prevalent; valid outcome measure?
Special Cases • PHN? • Trigeminal neuralgia?