What statement by the parents indicates a misunderstanding about digoxin administration?

The statement regarding holding the dose if the child's heart rate is above 90/min demonstrates a misunderstanding of digoxin administration guidelines. In pediatric patients, the threshold for withholding digoxin is generally higher; for infants, the typical threshold is a heart rate below 90 beats per minute, while for older children, it may be below 70 beats per minute. Therefore, if the child's heart rate is above 90/min, it typically does not warrant withholding the medication.

The other statements reflect a proper understanding of digoxin administration. For example, if a child vomits after a dose, it is appropriate not to administer another dose, as this can increase the risk of toxicity. Reporting symptoms of nausea and vomiting to a healthcare provider is also wise, as these can indicate potential adverse effects of the medication. Additionally, not mixing digoxin with other foods or liquids is a good practice to ensure that the child receives the exact dose prescribed without any alterations or interactions.