Bruce Wayne: What's that?
Lucius Fox: The Tumbler? Oh, you wouldn't be interested in that.
Henri Ducard: Always mind your surroundings.
Alfred Pennyworth: Actually it was Mr. Earle, he's taking the company public. He wanted to liquidate your majority sharehold. Those shares are worth quite a bit of money.
Bruce Wayne: It's a good thing I left everything to you then.
Alfred Pennyworth: Quite so, sir. And you can borrow the Rolls if you like. Just bring it back with a full tank.
Batman: I won't kill you... But I don't have to save you.
Bruce Wayne: A guy who dresses as a bat has issues.
Bruce Wayne: They told me there was nothing out there, nothing to fear. But the night my parents were murdered I caught a glimpse of something. I've looked for it ever since. I went around the world, searched in all the shadows. And there is something out there in the darkness, something terrifying, something that will not stop until it gets revenge. Me.
Dr. Jonathan Crane: He's here.
Cop: Who?
Dr. Jonathan Crane: The Bat...man.
Answer: Bruce is just as infected as Falcone, however he is rescued by Alfred shortly after he is poisoned and given an antidote by Lucius shortly after that. He is then bedridden for many hours. If he had not been saved as quickly as he was, he no doubt would have been a blubbering mass just like Falcone. The reason Rachel and even Bruce don't react the same as Falcone the moment they are poisoned comes down to how each individual person reacts to fear: Bruce tries to fight, Rachel faints, Falcone screams in horror.
BaconIsMyBFF