Back in season 1, Shannon's inhalers were missing and everyone thought Sawyer had them, but he didn't. In episode 3x14, Expose, Paulo found the inhaler when he was on his way to the question mark (the Pearl Station) and threw it aside, but the scene was cut.
Source: Lost Season 5 DVD Bonus Features, He's Our You Commentary.
Go to: Lost Trivia Fact 131