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The role of pyridostigmine in recovery from motor paralysis in a snakebite patient with an allergic reaction to anti-snake venom

A 30-year-old woman presented as an emergency with a history of snakebite 5 h previously with signs of bulbar palsy, ptosis, respiratory distress and weakness of all four limbs. Mechanical ventilation, anti-snake venom (ASV) and supportive management were immediately instituted. With the third dose of ASV, an early anaphylactic reaction ensued. Subsequent management with corticosteroids and antihistamines over the next few days allowed consciousness to return but muscle power did not improve beyond 2/5. A trial of intravenous neostigmine with glycopyrrolate, however, improved motor power in all four limbs to 3/5. Oral pyridostigmine at 60 mg every 8 h allowed subsequent full motor recovery in all four extremities. We suggest consideration of pyridostigmine to promote motor recovery after an allergic reaction to ASV.