Codeine is a medication that belongs to the class of drugs known as opioids. It is commonly used for the treatment of mild to moderate pain and as a cough suppressant. Codeine is available in various formulations, often combined with other medications such as acetaminophen (paracetamol) or ibuprofen.

As an opioid, codeine works by binding to opioid receptors in the brain, spinal cord, and other parts of the body, reducing the perception of pain. It can also act on the cough center in the brain to suppress coughing.

Codeine is available by prescription in some countries, while in others, it may be available over the counter in lower doses or in combination with other non-opioid medications. It is important to follow the recommended dosage and instructions provided by a healthcare professional or as indicated on the packaging.