Oxycodone is a highly addictive drug that Jack was seen abusing. Some commonly known commercial formulations include "OxyContin", as well as the acetominophen-oxycodone combination sold as "Percocet". Around a year after he had been rescued from the island, Jack had apparently become dependent on this drug. As a medical doctor, Jack would have been well aware of the addictive properties of the drug. ("Through the Looking Glass, Part 1") Benjamin Linus flushed down Jack's oxycodone stash while staying with him in a hotel room. ("The Lie")