Administering Narcan to a person not experiencing an opioid overdose typically has no significant effects. Narcan specifically targets opioid receptors in the brain. If no opioids are present to be displaced, Narcan simply has nothing to act upon. This safety profile underscores why it's widely recommended for use in suspected opioid overdoses, even if there's uncertainty about the presence of opioids. The lack of harm in such situations makes Narcan an incredibly safe intervention in emergencies. This is especially comforting in urgent, stressful situations where it's not clear why someone is showing certain symptoms and quick action is needed.