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A 28 year old woman with a past medical history of major depressive disorder is brought to the hospital by her family after she began refusing to speak, eat, or drink in the past day. Her family says she has been depressed for the past 2 months, and it has been getting progressively worse. She does not take any medications. On exam, she appears dehydrated, underweight, dressed in a hospital gown, lying in a bed in the emergency department. She looks straight ahead and does not make eye contact, and does not answer your questions, nor will she follow commands. HR is 94, BP is 102/72, RR is 14 and temp is 98.1. Physical exam is limited by patient cooperation. Reflexes are 2+ bilaterally in the upper and lower extremities. Lab work and imaging tests are unremarkable with the exception of slightly elevated Na and Cr. Which of the following is the next best treatment option after IV rehydration and supportive care?