system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 42–year–old man comes to the emergency department because of sudden-onset diarrhea and nausea directly following a fish barbeque at the beach. The next day, he cannot lift his left hand. Examination shows a wrist drop in the left hand. His pulse is 56/mm. However, his pupils are normal and there is no difficulty in eating. 

Which of the following is the treatment for this condition?
assistant
The correct answer is  None