A nurse is providing teaching about digoxin administration to the parents of a toddler who has heart failure. Which of the following statements should the nurse include in the teaching?

Having the child drink water after swallowing digoxin ensures the medication is fully swallowed and reduces the risk of local irritation. If the child vomits after receiving digoxin, the dose should not be repeated because double dosing can cause toxicity. Hypokalemia increases digoxin toxicity — so adequate potassium intake must be maintained, not limited. Digoxin should never be mixed with food or juice, as the child may not finish the full dose and the exact amount received cannot be determined.