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You are seeing a 6 year old boy with a few days of episodes of crying and jaw clenching, decreased oral intake, and intermittent painful muscle spasms causing him to arch his neck and back. He cannot control or stop the spasms, but is otherwise alert. He visited a cousin’s farm 6 days ago where he played with a goat, drank unpasteurized milk, sustained a small laceration to his scalp that was allowed to heal on its own, and had a tick on him that was pulled off by his mother that evening. He is unimmunized by parent choice. He has received no medications and has no PMH. His temperature is 38.2, HR 140, RR 20, BP 130/65. O2 sat 97% on room air.

Which is appropriate treatment for his condition?