Codeine is a naturally occurring opiate and foundational prodrug analgesic, revered for its effective cough suppression and mild-to-moderate pain relief. However, its utility is tightly constrained by its metabolism into morphine, carrying significant risks of respiratory depression, addiction, and fatal overdose, making it a medication that demands extreme respect and stringent medical oversight. 1. Overview: Codeine is a phenanthrene alkaloid derived from the opium poppy, f