No, but let’s say that same person came in with a report of vomiting blood, suggesting esophageal varacies which are common in alcoholics due to hepatic portal hypertension but their hematocrit is stable. The next course of action would be to perform an upper endoscopy to see if those varacies are treatable before they really pop and the person bleeds out. That procedure would require informed consent, since it’s not emergent even if it is a direct threat to their survival.