During an admission assessment, a client reports currently using heroin. Which information is most important for the nurse to consider in the plan of care?

A. Feelings of disorientation: Disorientation can occur with heroin use but is often transient and managed symptomatically. While relevant, it is less critical than other long-term safety risks when forming an initial care plan. B. Undiagnosed social anxiety symptoms (SAD): Social anxiety may contribute to substance use, but it requires formal diagnosis and long-term intervention. Immediate concerns like suicide risk take precedence in acute care planning. C. History of suicide attempts: A history of suicide attempts indicates a significant risk for self-harm, particularly in individuals using depressant substances like heroin. This information is vital in determining safety precautions, monitoring needs, and mental health interventions. D. Family history of schizophrenia: Genetic predisposition to schizophrenia is relevant for long-term mental health surveillance, but it does not demand urgent intervention during an initial admission for heroin use unless psychotic symptoms are present.