Codeine (500 mL bottle, 10 mg / 5 mL codeine syrup)

What It Is

Codeine is a prescription opioid medication used to treat mild to moderate pain and to relieve cough. It is available in different forms, including tablets and liquid syrups, depending on the medical purpose. Because it is an opioid, it is controlled and requires a prescription.

How It Works

Codeine works by binding to opioid receptors in the brain, reducing pain signals and suppressing the cough reflex. In the body, part of codeine is converted into morphine, which contributes to its effects. This makes it effective but also means it carries risks if misused.

Medical Use and Safety

Codeine is typically used for short-term treatment. In liquid form, it is often prescribed for cough, while tablets are more common for pain relief. Side effects may include drowsiness, constipation, nausea, and slowed breathing. Misuse can lead to dependence or overdose, so it must be used under medical supervision.