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?

"Limit your child's potassium intake while she is taking this medication."

"Repeat the dose if your child vomits within 1 hour after taking the medication."

"Have your child drink a small glass of water after swallowing the medication."

"You can add the medication to a half-cup of your child's favorite juice."