Codeine is a commonly prescribed pain medication that falls under the category of opioids. It works by binding to specific brain and spinal cord receptors, blocking pain signals, and providing relief. Typically used to treat mild to moderate pain, Codeine is often combined with other medications like acetaminophen to enhance its effectiveness. While it can be effective in managing pain, it also comes with potential side effects including dizziness, drowsiness, constipation, and nausea.