Final answer:
Codeine is an opioid pain medication that is contraindicated in children due to the risk of respiratory depression and other serious side effects.
Step-by-step explanation:
The opioid pain medication that is contraindicated in children is codeine. Codeine is an opioid with relatively low potency, but due to severe adverse effects, including the risk of respiratory depression, the U.S. Food and Drug Administration (FDA) has warned against its use in children. This decision was based on the potential for serious breathing problems. Opioids like oxycodone, Vicodin (hydrocodone), and morphine are also used for pain relief but come with strict guidelines regarding their use in children due to the risks of overdose and dependency.