Character mistake: Quinn told Dr. Sullivan there was "enough [morphine in the syringe] to kill you three times." If this was true (as opposed to Quinn just saying that as a scare tactic), her failure to take three vials of the antidote Narcan was a fatal error - and she only took one dose. Moreover, even if one dose was enough to counteract the morphine and get her to breathe normally, there was always a possibility that another dose or so can be needed. It is worth mentioning that it is quite a handy "coincidence" that vials of Narcan were readily available in the closed wing of the hospital. (01:12:28)
Character mistake: When they're making the protection circle they make a star of David and not a pentagram, 6 points in a star vs 5 points.
Suggested correction: I don't think there was anything in the movie that dictated a pentagram had to be used. In the book of protection rituals they were using, the particular ritual showed a picture of the star of David they needed to create, so that's what they used (plus salt).
To add to the correction, what the mistake refers to as "Star of David" is a hexagram and the use of hexagrams in the occult are not uncommon. You can find salt protection circles that use the hexagram.
