He heads into Wilson's office, where Wilson is lying on the couch in the dark trying to sleep off his amphetamine withdrawals. House ignores Wilson's pain and says that his patient just accused him of being happy. House says he wasn't happy, he was "hazy." And not because of Vicodin. He suspects that he was taking another drug unknowingly, and asks Wilson why he wouldn't give him any anti-depressants last night. He suspects Wilson didn't want House to double-dose, as Wilson had secretly been putting anti-depressants in House's coffee and has been for a few weeks now. Wilson points out that his awesome plan made House happier. House says he only seemed happy to some "moron" who didn't even care why she was dying. Meanwhile, I'm feeling a lot less sorry for Wilson for being dosed with speed now that I know he's been dosing House all this time. They both suck. Wilson thinks it's pretty impressive that even a dying girl noticed the change in House. House says this dying girl wasn't especially bummed out or anything, so it's not that special. And then he stops and has an epiphany. "Oh, God. I gotta go," he says, cheerfully.
He heads back to Addie's room, and Dad stands up, ready to beat House up. House tells the parents to leave the room, dangling the carrot of their daughter living in front of them to get them to do it. I wouldn't leave my dying/possibly not dying daughter alone with him, but they do. House tells Addie that she has a leprechaun in her arse after all. But first, she's depressed. Addie denies this, looking like she doesn't give a shit. When House takes a seat on her bed and accuse her of trying to kill herself by drinking kitchen cleanser, though, her eyes widen so you know he's right. He says Addie did it a special way: she somehow put the cleanser in either gel caps or gum so that the cleanser would leave no trace in her mouth and throat but would burn a hole in her intestines. Except then her body healed itself and scar tissue closed the hole after what I'm sure must have been a lot of pain. That scar tissue then formed a bridge connecting her artery and vein. The blood in her veins that's supposed to flush bacteria in the intestines out of her system was instead being filtered back into her via the artery, causing all the infections. Wow, that is sophisticated. What's wrong with throwing yourself off a bridge, Addie? Geez. Addie asks House if they can fix her, looking like she's dreading whichever answer she gets. House says they can fix the physical damage in a few hours. The mental damage will take a little longer.