“Eat a few pickles before going to bed...”
I have a friend that was born and raised in Moldova (now an American citizen). She swears the old country’s method for a hangover was pickle juice. I don’t drink much myself but I found your suggestion and hers related.
I think it has to do with the brine’s antidiuretic effects. College football and NFL teams now stock coolers of pickle juice during summer workouts to avoid dehydration.