You can read novel chapters 220-221 to see by yourself but basically Eckles didn't drug Penelope to kidnap her in the novel version, he forced her to get in a carriage with him so they could go to the Palace (he had masked armed men surrounding her and that showed his status as a Prince).

His discussion with Penelope in the novel version is a extended and the way he took her wand isn't the same, you can also feel more of Penelope's disgust in the novel since we can read her inner thoughts.