Final answer:
The nurse should instruct the parent and child to take the iron supplement on an empty stomach, contact the healthcare provider if vomiting persists, and consider switching to a liquid iron supplement if vomiting continues.
Step-by-step explanation:
The nurse should give the following instructions to the parent and child:
- Administer the iron supplement on an empty stomach. Taking the iron supplement with food or milk can decrease its absorption, so it is best to take it on an empty stomach.
- Contact the healthcare provider if vomiting persists. Persistent vomiting could be a sign of an adverse reaction, and it is important to seek medical advice.
- Switch to a liquid iron supplement if vomiting continues. If the child continues to vomit after taking the iron tablets, switching to a liquid form of iron supplement may be a better option to avoid further discomfort.