A 24-year-old woman with three days of fatigue and bloody diarrhea; Exam shows dry mucous membranes and absent bilateral patellar reflexes. What is the most appropriate next step?

• A. Administer IV antibiotics
• B. Transfer to ED
• C. Begin oral rehydration and discharge
• D. Administer IV antiemetics

Answer: (B)

The key point is recognizing a patient with dehydration and potential electrolyte disturbance from GI loss who needs urgent evaluation and treatment in a setting equipped to monitor and address these issues. Dry mucous membranes plus signs like absent reflexes point to significant volume depletion and likely electrolyte abnormalities (often hypokalemia from diarrhea). These problems can progress quickly and require IV fluids, electrolyte repletion, and diagnostic workup in a monitored environment. That’s why the most appropriate next step is to transfer to the emergency department now, so she can receive IV fluid resuscitation, electrolyte correction, and appropriate testing.

Outpatient options or treating only with antiemetics wouldn’t address the dehydration or the possible electrolyte disturbance, and starting antibiotics without evidence of systemic infection or invasive disease isn’t the immediate priority when her stability is in question. Initiating oral rehydration and discharge would risk ongoing dehydration and complications.