CPL Human Factors · Mock exam

A pilot takes a single 10mg dose of zolpidem (a sleep aid) at 11 pm to help sleep before an early morning flight. Zolpidem has a half-life of 2.5 hours. What is the PRIMARY concern for a 6 am departure?

• A.No safety concern — 7 hours is well beyond 5 half-lives
• B.Zolpidem interacts with avgas to produce carbon monoxide
• C.Residual sedation and cognitive impairment may persist
• D.Zolpidem causes irreversible retinal damage affecting pre-dawn vision