Not only are cigarettes bad for your overall health, they can make your hangover that much worse the next morning.
Researchers who looked at the smoking and drinking habits of college students found that those who smoked on the nights that they drank heavily had much more severe hangovers the following day.
While the exact reason for this is still unknown, researchers surmise it may be because smoking can cause people to drink more, according to a 2005 study in the journal Drug and Alcohol Dependence. This leads to more severe symptoms the next day. Another idea is that chemicals in cigarettes can heighten the overall pharmacological effects of alcohol.
Jordan & Marks