When a doctor prescribes medicine for a 9-year-old child, it is generally considered safe because the doctor has evaluated the child's health condition and chosen an appropriate treatment. However, it is important to:

• Follow the doctor's instructions carefully, including the correct dosage and timing.
• Inform the doctor about any allergies or other medications the child is taking to avoid interactions.
• Watch for any side effects or unusual reactions and report them to the doctor immediately.

Always avoid giving medicines without a doctor's advice, especially in children, to ensure safety and effectiveness. If you have any concerns or notice anything unusual, please consult a pediatrician promptly.