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continued:

Anti-seizure medications: Relief from nerve pain

Side effects limit treatment

Anti-seizure drugs have been used to treat nerve pain for more than 50 years, but their use was limited by the severity of side effects they produce.

Older anti-seizure drugs include:

  • Carbamazepine (Carbatrol, Tegretol)
  • Phenytoin (Dilantin)
  • Valproic acid (Depakene)

Side effects may include:

  • Liver damage
  • Nausea
  • Vomiting
  • Double vision
  • Loss of coordination
  • Drowsiness
  • Headache

Because these older drugs generally have more side effects than do the newer anticonvulsants, they often are used only when the newer medications prove ineffective.

Newer anti-seizure drugs

Many new anti-seizure drugs have been developed in the past 15 years. Some help relieve pain caused by damaged nerves.

  • Gabapentin (Neurontin)
  • Oxcarbazepine (Trileptal)
  • Pregabalin (Lyrica)
  • Tiagabine (Gabitril)
  • Topiramate (Topamax)

Gabapentin has the fewest side effects, so it typically is the first anti-seizure drug tried in people experiencing nerve pain. Gabapentin and pregabalin, which is similar to gabapentin, are particularly effective in the treatment of postherpetic neuralgia, diabetic neuropathy and migraines.

Research is continuing

As scientists learn more about the way anti-seizure drugs work, this information will be useful in determining which drugs may work best for different types of nerve pain. Pain caused by nerve damage can be disabling, but anti-seizure drugs sometimes provide relief.

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References
  1. Bajwa ZH, et al. Antiepileptic drugs in the treatment of neuropathic pain. http://www.uptodate.com/home/index.html. Accessed Sept. 16, 2008.
  2. Diabetic neuropathies: The nerve damage of diabetes. National Institute of Diabetes and Digestive and Kidney Diseases. http://diabetes.niddk.nih.gov/dm/pubs/neuropathies/index.htm. Accessed Sept. 16, 2008.
  3. Shingles: Hope through research. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/shingles/detail_shingles.htm. Accessed Sept. 16, 2008.
  4. Side effects and ways to manage them. In: Chemotherapy and you: Support for people with cancer. National Cancer Institute. http://www.cancer.gov/cancertopics/chemotherapy-and-you/page7#SE12. Accessed Sept. 23, 2008.
  5. Low back pain fact sheet. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/backpain/detail_backpain.htm. Accessed Sept. 23, 2008.
  6. Barkin RL, et al. Pharmacotherapeutic management of acute and chronic pain: Anticonvulsants. In: Rakel RE, et al. Textbook of Family Medicine. 7th ed. Philadelphia, Pa.:Saunders Elsevier; 2007. http://www.mdconsult.com/das/book/body/104961741-4/0/1481/214.html?tocnode=53392677&fromURL=214.html#4-u1.0-B978-1-4160-2467-5..50023-3--cesec73_891. Accessed Sept. 16, 2008.
  7. Trigeminal neuralgia fact sheet. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/trigeminal_neuralgia/detail_trigeminal_neuralgia.htm. Accessed Sept. 16, 2008.

PN00045

Nov. 18, 2008

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