Hi.
Thanks for your query.
Noted the history about your son and understood your concerns.
Gastritis in a 16 year is not common and has pain not relieved by
Buscopan and Topzole 40.
Hence I would advise him the following:
Topzole can be repeated but may not be that effective.
Antibiotics have role only if there is any evidence of infection by means of clinical presentation of
diarrhea, fever, chills or so on.
Antacid liquid every three hours.
Domperidone at 8 hourly interval.
Buscopan if there is pain.
If there is no relief, it is necessary to have further evaluation by an Upper GI
Endoscopy and other tests to get a proper diagnosis and management.
Soft bland diet.
Further investigations like CT scan and others of stool, blood and urine as needed to help in diagnosis.