Report Abuse. Japan is very conservative. Japan is also intolerant of others and xenophobic. They tend to be more monolithic than the US-there is very little diversity among the population.
The only way that alcohol can affect any of these antibiotics is to alter the rate in which the liver breaks them down or increase the rate in which they are excreted. However, because this is only true of certain antibiotics it is not true that alcohol, as a rule, decreases the effectiveness of antibiotics.
Drinking any amount of alcohol with these medications can result in side effects such as flushing, headache, nausea and vomiting, and rapid heart rate. Keep in mind that some cold medicines and mouthwashes also contain alcohol. So check the label and avoid such products while taking these antibiotics.