The nurse is teaching parents about administering digoxin. What instructions should the nurse tell the parents?

A. Giving an extra dose after a missed dose can lead to toxicity. Parents should skip the missed dose and not give two doses at once. B. Digoxin should not be mixed with formula because it may affect the absorption of the medication. C. If the child vomits, do not administer another dose. The nurse should instruct parents to monitor for vomiting and hold the dose if needed. D. Giving the medication at regular intervals ensures consistent therapeutic levels and reduces the risk of toxicity.