Why is methadone not typically used for PCA in children?

• A. It is not available in parenteral form in the United States
• B. It is not effective for postoperative pain
• C. It has too long a duration
• D. It is too expensive for routine use

Answer: (A)

The key idea is that PCA relies on delivering opioid medication through a parenteral route (usually IV) in a way that is easily titratable for a child after surgery. Methadone isn’t available in a parenteral form in the United States for analgesia, so it can’t be used in a standard pediatric PCA pump. While methadone has properties that could affect analgesia—such as effectiveness in some pain settings and a long duration—these aren’t the practical barrier here. The lack of a US-approved parenteral formulation for PCA is the main reason it isn’t typically used in children.