Etanercept biosimilar associated with Guillain-Barré syndrome: insights from a case

: Anti-tumor necrosis factor drugs are used routinely according to treatment guidelines for several chronic rheumatologic problems. However, a rare and usually unpredictable adverse drug reaction namely peripheral nervous system demyelination is being increasingly recognized. Biosimilars are gaining momentum especially in countries like India. Hence, we report a case of Guillain-Barre syndrome secondary to an etanercept biosimilar, probably the first case reported so far.