Question: what to do when someone is vomiting from alcohol?
Answer: Drink small sips of clear liquids to rehydrate. ... 
Get plenty of rest. ... 
Refrain from “hair of the dog” or drinking more to “feel better.” ... 
Take ibuprofen to relieve pain. ... 
Eat small bites of bland foods, such as toast, crackers, or applesauce to keep your energy up.