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Restless Legs

Restless Legs: Excerpt from In a Page: Signs and Symptoms

Restless legs are a common complaint that cannot simply be diagnosed as restless legs syndrome without an appropriate evaluation to assess for other etiologies. A careful sleep and medication history, coupled with a complete neurologic exam, are often all that is needed to establish the correct diagnosis.

Differential Diagnosis

  • Normal snoring with periodic limb movements
  • Nocturnal leg cramps
    –Associated with painful, crampy calves
  • Chronic insomnia
  • Sleep disturbance due to medication/drugs
    –Commonly associated with decongestants, steroids, caffeine, and β-blockers
    –May be due to withdrawal from tobacco, alcohol, or illicit drugs
    –Akathisia (e.g., neuroleptics, dopamine antagonists, drug withdrawal)
    • Restless legs syndrome
      –Feelings of creeping, crawling, burning, pulling, itching, tugging, and discomfort in the legs are relieved by involuntary leg movement
      –Most patients are >50 years old
      –Often unilateral
      –Positive family history in 1/3 of cases
      –Symptoms are exacerbated by pregnancy, end-stage renal failure (dialysis increases restless legs activity; kidney transplant improves symptoms), and some medications (e.g., lithium antidepressants, dopamine antagonists)
    • Peripheral neuropathy
      –Associated with numbness, tingling, and pain
      –Leg pain not relieved by movement
      –Consider diabetes and deficiencies of vitamin B12 and folate
    • Peripheral vascular disease
    • Deep venous thrombosis, venous stasis
    • Delayed deep sleep syndrome
    • Hyperthyroidism
    • Sleep deprivation
    • Sleep anxiety
    • Spinal cord/vertebral disc disease
    • Extrapyramidal symptoms due to medications (e.g., dystonic reaction, pseudoparkinsonism, neuroleptic malignant syndrome from antipsychotics)

    Workup and Diagnosis

    • History and physical examination
      –Restless legs is one of the most common causes of insomnia
      –Inquire about sleep patterns and sleep history from patient and bed partner
      –Determine whether pain is relieved by movement
      –Include complete medication history (e.g., tricyclic antidepressants are often prescribed for insomnia, but tend to worsen restless legs)
    • Initial labs may include CBC, iron studies, fasting glucose, BUN/creatinine, electrolytes, calcium, magnesium, TSH, vitamin B12, and pregnancy test
      –If anemic, a workup for blood loss is indicated (e.g., colon and upper GI evaluation, urinalysis for hematuria, consider endometrial biopsy in older women)
  • Sleep study to define sleep pathology

Treatment

  • Withdraw medications that may cause extrapyramidal side effects (e.g., tricyclic antidepressants, reserpine, propranolol, phenothiazines, metoclopramide, methyldopa, haloperidol, oral contraceptive pills)
  • Iron replacement and treatment of underlying pathology (e.g., colon cancer) for anemic patients
  • Dopamine agonists (e.g., carbidopa/levodopa, pergolide, pramipexole, ropinirole) are often useful
  • Carbamazepine is useful, but may result in cognitive impairment and fatigue
  • Gabapentin has been very effective and has fewer side effects (especially useful in patients with concomitant neuropathy)
  • Clonidine is useful in patients with hypertension
  • Narcotics may be used for short-term relief
  • Offer emotional support

Book Source Details

  • Book Title: In a Page: Signs and Symptoms
  • Author(s): Scott Kahan, Ellen G. Smith
  • Year of Publication: 2004
  • Copyright Details: In a Page: Signs and Symptoms, Copyright © 2004 Lippincott Williams & Wilkins.

More About Restless Legs Syndrome

More Medical Textbooks Online about Restless Legs Syndrome

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Copyright notice for book excerpts: Copyright © 2008 Lippincott Williams & Wilkins. All rights reserved.




More About This Book:
Title: In a Page: Signs and Symptoms
Authors: Scott Kahan, Ellen G. Smith
Publisher: Lippincott Williams & Wilkins
Copyright: 2004
ISBN: 1-4051-0368-X

 » Next page: Low Back Pain/Swelling (In a Page: Signs and Symptoms)

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