Which statement indicates that a mother of a child on digoxin needs further education?

The statement indicating that further education is needed pertains to the mother's approach to missed doses of digoxin. It is crucial for caregivers to understand the proper protocol for administering this medication due to its narrow therapeutic index and potential for toxicity.

When a dose of digoxin is missed, the standard advice typically is to skip the missed dose if it is close to the time of the next scheduled dose; it is not advisable to give an extra dose immediately. This recommendation is based on the risk of accumulating too much medication in the system, which can lead to serious side effects. Therefore, the mother’s intention to provide an extra dose indicates a misunderstanding of how to safely manage doses of digoxin.

The other statements reflect a proper understanding of digoxin management: administering the medication at regular intervals is essential for maintaining therapeutic levels, avoiding a make-up dose after vomiting is correct since a full dose may lead to toxicity, and mixing the medication with formula is an acceptable practice to help the child take the medication, although it should be done with caution to ensure the complete dose is administered.