If you are working the flight, per many FOMs there is a policy to follow. Ask her if she cares to repeat or withdraw the comment. If she does not withdraw, you required to go take a test. Like others have said, I would tell her she just delayed the flight for herself and everyone else around as I must follow procedure and take every allegation seriously. Throw the delay in her face.

That's not being a drama queen, that's following airline policy. If you work for an airline, check your FOM to see if "shae your head" is part of the alcohol accusation policy.