The school nurse administers methylphenidate to an adolescent with Attention Deficit Hyperactivity Disorder (ADHD). When evaluating the drug's effectiveness, which information is most important for the nurse to review?

A) Obtain a restraining order against the father:
Obtaining a restraining order is a legal action that can be taken to protect the child but is not typically within the scope of the nurse’s immediate responsibilities. This action would involve law enforcement and the legal system rather than being an immediate next step in the healthcare setting. The nurse's role is to report the suspected abuse and ensure that appropriate protective services are involved.

B) Encourage the mother to file a police report:
Encouraging the mother to file a police report is a potential step in addressing the situation, but it should not be the nurse's immediate next action. The nurse's primary responsibility is to ensure that the appropriate child protective services are notified and involved, as they are equipped to handle investigations and interventions in cases of suspected child abuse.

C) Ask the child if his father ever spanks him:
Asking the child about specific forms of discipline, such as spanking, could potentially place the child in a difficult or unsafe position, especially if abuse is suspected. It is not the nurse's role to investigate or interrogate the child directly. Instead, the focus should be on ensuring that the proper authorities are notified to handle the investigation.

D) Refer the family to protective service agencies:
Referring the family to protective service agencies is the most appropriate next step. These agencies are specialized in handling cases of suspected abuse and can provide the necessary intervention and support for the child’s safety and well-being. The nurse's role includes reporting suspected abuse to the appropriate authorities and ensuring that protective services are contacted to investigate and address the situation.

A) Instruct on technique of "stop, drop & roll" at assembly:
This is a primary prevention intervention aimed at educating students on how to prevent burns in the event of a fire. It does not address a specific identified problem but rather provides general safety education.

B) Involve the parent teacher association (PTA) in a fund raising event for the new gym:
This action focuses on raising funds for a new gym, which is related to school improvement and development rather than addressing an immediate health issue. It does not fall under secondary intervention for an identified problem.

C) Invite 1st grade parents to a "Meet the Teachers" event:
This intervention focuses on fostering relationships between parents and teachers and improving school engagement. While valuable, it does not address a specific health problem that requires secondary intervention.

D) Send letters to parents regarding a recent lice infestation:
This is a secondary prevention intervention aimed at addressing an already identified problem—in this case, a lice infestation. By informing parents, the nurse is helping to manage and control the spread of lice among students, which is a direct response to an identified health issue.