Which autonomic nervous system (ANS) symptoms may be present in Guillain-Barre syndrome (GBS)?

Updated: Jul 14, 2021
  • Author: Michael T Andary, MD, MS; Chief Editor: Milton J Klein, DO, MBA  more...
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Autonomic nervous system involvement with dysfunction in the sympathetic and parasympathetic systems can be observed in patients with GBS.

Autonomic changes can include the following:

  • Tachycardia

  • Bradycardia

  • Facial flushing

  • Paroxysmal hypertension

  • Orthostatic hypotension

  • Anhidrosis and/or diaphoresis

Urinary retention due to urinary sphincter disturbances may be noted. Constipation due to bowel paresis and gastric dysmotility may be present. Bowel and bladder dysfunction are rarely early or persistent findings.

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