A child with heart disease starts on oral digoxin (Lanoxin). When preparing to administer the medication, which of the following should the nurse do first? 1. Check the last serum electrolyte results...

A child with heart disease starts on oral digoxin (Lanoxin). When preparing to administer the medication, which of the following should the nurse do first?

1. Check the last serum electrolyte results for the child.

2. Verify the dosage with a licensed practical nurse who is working that day.

3. Ask the mother if she is willing to administer the medication.

4. Teach the mother how to measure the child's heart rate.