Isopropyl is drinkable (and highly intoxicating). Just very unpleasant to drink and highly irritating to the mucosa.
I am not sure I would call that "drinkable", unless you just mean it will physically go down your gullet.
Nearly everything above is also true of ethanol.
Drinking too much water is also lethal.
I take care of plenty of patients that drink IPA. It is not uncommon in both people that think it will kill them and do it as a suicide attempt, as well as people that are desperate for a buzz but can't access ethanol (I work on the Navajo nation where ethanol is illegal and more difficult to obtain).
In general, these patients sober up and go home, just like patients that drink ethanol. Compared to ethanol, patients are much more intoxicated, take much longer to get sober, and are more likely to exhibit symptoms of gastritis or esophagitis. But there is nothing about caring for them that is categorically different than caring for a patient with a significant alcohol ingestion -- in both cases, it is dose dependent.
(Just looked it up on Wikipedia - I recall correctly)
I'm an ER physician. I have worked in a poison control center. I take care of the people that drink IPA. I work on the Navajo Native American reservation, where this isn't terribly uncommon.