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Many medications and not only antibiotics in interaction with alcohol could lead to :
- increased risk of illness
Statistics show that alcohol-medication interactions made up at least 25 percent of all emergency room visits.
Incidence of the alcohol-drugs interactions
Over 2,800 prescription drugs are available in the United States today and health experts prescribe 14 billion of them annually. Additionally, there are around 2,000 over-the-counter medications. With 70 percent of the adult population consuming alcohol occasionally and 10 percent drinking daily, some concurrent use of alcohol and medications is inevitable. 
Although people age 65 and older make up only 12 percent of the population, they consume 25 to 30 percent of all prescription medications and may be more likely to use them along with alcohol consumption. This puts this age group at particular risk for suffering the adverse consequences of such combinations. They are also more likely to experience medication side effects in comparison to younger people, and these effects tend to get more severe with advancing age.
What kind of drugs are antibiotics? These drugs kill or slow the growth of bacteria. They belong to the class of antimicrobials, a larger group which also includes antiviral, antifungal, and anti-parasitic drugs.
Classes of Antibiotics 
- Polymyxin B
- Prontosil (archaic)
- Sulfanilimide (archaic)