In the United States, when someone voluntarily admits themselves to a mental health facility, they typically have the right to request discharge at any time, as long as they are not considered a danger to themselves or others. Voluntary admission means that the person has agreed to be admitted for treatment voluntarily and can leave when they wish (unless they are deemed a threat to themselves or others, in which case, they may be subject to involuntary commitment).
However, each state may have its own specific laws and regulations regarding mental health treatment and voluntary admissions. It's essential for your friend to understand her rights and the specific policies of the facility where she is seeking help. She can ask the staff at the facility about the discharge process and any conditions that might lead to an extended stay. If she has any concerns or feels that her rights are being violated, she may want to seek legal advice or contact a patient advocate for support.
and laws or regulations may have changed since then. Always refer to current and reliable sources for the most accurate and up-to-date information.