Actually they are considering a black box warning about Tylenol and blood thinners. You should not take too much because it can cause bleeding.
So the nurse did know what she was talking about.
In the medical field you really should consider yourself a consumer. You are paying for the care. If you really feel that strongly about it, I would change MD's. Or ask if there is someone else you could deal with.

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Be careful what you wish for.....