A senior German court has ruled that hangovers are genuine illnesses which means that a German manufacturer’s “anti-hangover” drink breaks the country’s advertising rules that prohibit attributing to a food or a food supplement “any properties of prevention, treatment or cure of a human disease…” HBW looks at the general and court definition of a hangover, current research on the effects of hangovers on society at large, and the specifics of Germany’s advertising rules.