[livi]

Sorry to hear of your daughters situation. It is fairly common however and sometimes dependent on the Helicobacter pylori bacteria that in it self is a very frequent guest in our stomach lining. Often arguably not causing any trouble. But when it does, a combination of antibiotics like the one your daughter is prescribed, will mostly eradicate the little villain and heal the inflammation.
Many times however, there is no bacteria to be found and you have to rely on the standard acid reducing medications. It is common that the treatment is successful but often needs to be repeated and many time for longer periods, like 4-8 weeks.