Stomach flu or gastroenteritis is caused by viruses that attack and inflamed the stomach and intestine resulting in vomiting, stomach cramps or diarrhoea. These symptoms are the way of defending the body against infection and it gets over without medication on its own. No antibiotics are worth use as it is not caused by bacteria. But, we can definitely offer home solutions to make the sufferer more comfortable and avoid complications of dehydration. Just replenish the lost salts and fluids of the body by drinking more fluids including fresh juices, soups and broths. Go for foods with potassium like banana and potatoes to replenish the lost mineral stock.