[A case of Guillain-Barré syndrome with severe pain successfully controlled with acetaminophen, gabapentin, and parenterally infused fentanyl].

We presented a case of an 8-year-old boy with Guillain-Barré syndrome characterized by severe intractable pain in the soma and lower extremities, which appeared 2 weeks after a febrile cold. At his first visit to our hospital, he could not stand or walk because of the severe pain, and muscle weakness and absence of deep tendon reflexes were observed. Guillain-Barré syndrome was diagnosed on the basis of cerebrospinal fluid study results, nerve conduction velocity, and spinal cord magnetic resonance imaging. His pain was scored as a five on a six-point visual analog scale, and it persisted despite routine supportive therapy. The pain was successfully controlled with parenterally infused fentanyl. It is suspected that opioid analgesics are useful for severe pain control in patients with Guillain-Barré syndrome.