There is little evidence to support this view. There is however some that suggests not to mix drinks made from the grape and the grain, ie don't drink wine and whisky. While this won't cure any hangover it should help to reduce the dehydration. Exercise Sweating it out the next day can help but most people with a hangover are not in any condition to do strenuous exercise - even a walk in fresh air can help. Lots of food For those who are not feeling queasy eating plenty of food can help.
Masochistic types choose the bigger and heavier the breakfast the better.
More sensitive types might prefer dry toast. Using mild naturally occurring substances, Drink Ease has few if any side effects and is compatible with other medications. Drink Ease is sold in pharmacies and health food stores.