SIDE EFFECTS: Dry lips and mouth, minor swelling of the eyelids or lips, crusty skin, nosebleeds, upset stomach, or thinning of hair may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Duration of stomach flu depends on the severity of the attack. The condition may become worse in case of infants, young children and elderly who cannot drink sufficient fluids to compensate for dehydration experienced during the illness. For these people, stomach flu can last for 3 weeks or more.
Right. So you need to use some common sense here. The most common stomach viruses last 1-2 days. You should avoid food until you haven't had vomiting/diarrhea for 4-6 hours. You should have only water or clear liquids (plain tea, vegetable/chicken broth, sports drinks) by sipping them, not gulping. No soda. Period.