This medication is intended only for 'external' use. [=for use on the skin]
the 'external' features of the building
the 'external' signs of the disease
(..) Now this is where the victim, and it's usually the one... ...who's the most psychologically vulnerable... ...is targeted specifically by an external force. Breaks the victim down. Crushes their will. And, once in a weakened state, leads them to the third and final stage: possession. (..)2013 The Conjuring