not great. Common knowledge is that a typical sign of alcohol withdrawal is acute transient hypertension, even of a withdrawal severity not requiring formal medical detox. Safe to say that anyone going to the ER with possible covid acute respiratory distress should be sure to notify triage about alcohol use. If by chance you're admitted and get intubated, that's important history you may not be able to communicate after you're tubed.
Just glancing at mechanical ventilation sedation protocols on the web, looks like propofol is most used, or midazolam if propofol is poorly tolerated. Midazolam (Versed) is a relatively short acting benzodiazepine. Benzodiazepines are indicated for acute alcohol withdrawal and will help bring down hypertension from acute alcohol withdrawal. But due to short half life of midazolam, using a longer acting benzodiazepine like Ativan or Librium might be better for acute hypertension associated with alcohol withdrawal.
I think it's very likely alcohol withdrawal, even mild to moderate in people who don't self identify as being at risk, is likely a significant contributor to bad outcomes during the acute management of covid ARDS. To the extent this is being considered by the front line docs, and can be co-managed, more lives may be saved.
---> I could be wrong. just my opinion. Still tell any docs or triage about regular alcohol use to be safe.