: House deduces that Amber was taking amantadine for the flu. The crash caused acute kidney failure, preventing her body from processing the drug and resulting in lethal amantadine poisoning.
: The recovered memory reveals that House, too drunk to drive, called Wilson for a ride; Amber arrived instead. They were on the bus together when the accident occurred. The Medical and Moral Failure [S4E16] House's Head (Part 2)
For more detailed production history and award information, you can visit the House's Head Wikipedia page and the Wilson's Heart Wikipedia page . : House deduces that Amber was taking amantadine for the flu
: The episode concludes with Thirteen testing positive for Huntington’s disease, echoing the theme that life is often "unfair" and beyond a doctor's control. too drunk to drive