If you mean inpatient, here was my experience: They take your medications from you and throw them out. They then take a list of what you are taking and give you your psych meds. If you are on medications for something not psych related, they will look into your medical history and decide whether you need them or not (I did need them, but in their infinite wisdom they didn't give them to me)
Medications that you bring will be stored until you leave. You will meet with a Doctor upon admission who will speak with you about prescriptions, treatment, etc...
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