How can a person reduce the effects of diarrhoea in points?
If a person or child has chronic diarrhoea or vomiting for any period of time it is best to give the victim water to reduce the effects of dehydration. this is usually given mixed with glucose and minerals that are also lost with this malady. A short burst of this will not necessarily do much harm, however diarrhoea can kill if left untreated.
Yes, adding gasoline without ethanol will reduce the affects of ethanol by diluting it. You do not say which effects of ethanol you wish to reduce. What follows is true but sarcastic and not actually recommended. If you add almost anything non fuel to your fuel tank such as water it will reduce the effects of ethanol. Specifically it will reduce the effect of powering your engine.