Toture her

You and two stormtroopers enter Princess Leia's cell with an interrogation droid sporting many appendages, including a syringe with a tube connected to a cannister capable of dispensing several different types of interrogation medications. Despite the droid also have many other nasty appendages, Leia looks at the syringe with particular horror.

"Princess," your mechanical voice entones, "You will reveal the location of the stolen plans willingly or by ****."

The princess remains silent.

"Your insolence disappoints me," you sneer. "You have already proven immune to truth serum, but there are other substances for which you may not have resistance."