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.
Stomach bug vs. stomach flu Stomach bug and stomach flu are both terms for viral gastroenteritis. People typically develop stomach bug symptoms within 24 to 48 hours of being exposed to the virus. Many cases of the stomach bug resolve within a couple of days.