Sounds crazy right, but there is a reason why lots of people in northern Europe and Russia are obsessed with vodka. Vodka does not usually have nasty toxins in it. It is not just the alcohol in the drinks that make you hungover, it might also be the additive.
Drinks like whiskey, cognac and tequila are high in congeners. Congeners in simple terms are just chemicals/ drugs which are used to make different drinks which cause hangovers. For example bourbon whiskey and red wine are high in Congeners. Unfortunately well loved bubbles (champagne and soda mixers) are proven to increase the effects of hangovers.