This discussion board post presents an argument in favor of denying access to intensive care units (ICUs) for individuals with substance abuse issues. The author contends that substance abuse, including alcohol and drug addiction, can lead to uncooperative behavior, potential harm to other patients, and legal issues. The argument highlights the potential risks associated with addicted individuals in the ICU environment, emphasizing concerns about patient safety, security, and the disruption of healthcare services. The author cites several research papers to support the view that substance abuse can cause mental illness, generate negative attitudes, and lead to absenteeism among healthcare personnel. The post concludes by reinforcing the recommendation to deny ICU access to substance abusers to protect patients, families, and healthcare workers from potential harm and legal complications. The post references several studies and articles related to the topic.