As heroin leaves the brain and body, users experience withdrawal symptoms, which are often described as feeling like a severe case of flu.
Mixing alcohol with certain medications often causes nausea and vomiting, headaches, drowsiness, fainting, or loss of coordination.
The largest amounts of toxins in alcoholic drinks can be found in red wine and dark liquors such as bourbon, brandy, whiskey and tequila.
What a person expects from alcohol consumption often predicts if and when he or she will begin drinking as well as how much he or she will drink throughout young adulthood.