When should emergency medical treatment be initiated for a person who has ingested ethanol?

Emergency medical treatment for a person who has ingested ethanol should be initiated when the person exhibits an altered mental status. This is crucial because altered mental status can indicate a significant level of intoxication, which may lead to severe complications such as respiratory depression, hypoxia, or the risk of aspiration if the individual becomes unconscious or unresponsive.

In such cases, the priority is to assess and address the immediate health risks, ensuring that the person receives the necessary medical evaluation and intervention to manage potential complications associated with alcohol ingestion. It is essential to act swiftly, especially when altered consciousness is present, as this can significantly impact the person's ability to maintain their airway and protect themselves from further harm.