If it's any comfort to you we've all dealt with these kind of situations. If it's any comfort to you I have patient with down's syndrome and Alzheimer's who routinely walks around with a heart rate of 58 and a BP or 60/40. It's normal for him and the cardiologist justs says to note it and watch for him to be symptomatic.
If she is interefering with your drips you need to go to someone higher up the food chain - but don't really expect anything to change just keep a personal record of all your dealings with this person so you have a back-up if you need to prove a hostile work environment.
Peace
Hppy