- Opioids work by attaching to specific receptors in the brain, spinal cord, and gut. In doing so, opioids reduce the sending of pain messages to the brain.
- In addition to relieving pain, opioids can cause serious side effects (such as a sense of euphoria, shallow or slowed breathing, weak pulse, low blood pressure, sleepiness, constipation, and nausea).
Additional information on how opioids work is available from these sources: