Codeine 15 mg is an opioid medication used to treat mild to moderate pain and to suppress cough. As a member of the opioid family, it works by altering the way your brain and nervous system respond to pain. Codeine is commonly prescribed for short-term use to manage pain following injury or surgery, as well as to relieve severe coughing caused by respiratory conditions. Due to its potential for misuse and dependency, it should only be used under strict medical supervision and exactly as prescribed.