It's the end of Molly's second night shift of Foundation Year, and she's about to strangle the doctor taking over for her. Geoff is both brilliant and handsome, and he's obviously been told that once too often. He intends to be an orthopaedic surgeon and looks down his nose at the "nerd" specialties, particularly pathology. "Can hardly call yourself a doctor if you never deal with living patients," he scoffs.
Just before shift change, a new patient arrives on the ward – a 65 year-old man with liver failure. The police had brought him in because he was drunk and disorderly, but by the time Molly sees him, he's calmed down significantly. The man complains of abdominal pain, and Molly orders hydrocodone instead of the meperidine the man asked for. At end of shift, she explains to Geoff that meperidine would give the man a seizure. Geoff grunts.
That night, Molly returns to work and checks on the man with liver failure but finds his bed empty. She asks a nurse what happened to him.
"Transferred to ICU after his seizure."
"His seizure?"
The nurse rolls her eyes. "Geoff ordered meperidine."
Molly's greatest fear is that she'll be blamed for her colleague's mistake.
A/N: Meperidine (brand name Demerol in the US) can indeed decrease the seizure threshold. It's especially dangerous in patients who are already at risk for a seizure - like patients who are in alcohol withdrawal.