a medicine which is mixed with water to make a fizzy drink (= one containing many bubbles) that people take when they have indigestion (= stomach pain caused by difficulty in digesting food or drink):
He took an Alka-Seltzer and went back to bed.
a medicine which is mixed with water to make a fizzy drink (= one containing many bubbles) that people take when they have indigestion (= stomach pain caused by difficulty in digesting food or drink):
He took an Alka-Seltzer and went back to bed.
Oxford guide to British and American culture English vocabulary. Руководство по британской и американской культуре, Оксфордский английский словарь. 2005