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.
Characteristics of Stomach Flu and Food Poisoning. Stomach flu: Stomach flu is caused by the infection of the GI tract, and the symptoms emerge one to two days after exposure to the virus and usually last for one- two days, however, in some cases, can last for up to 10 days.