Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Seek emergency help for:
Vomiting blood or material resembling coffee grounds
Black, sticky or tar-like stools
Sudden, severe abdominal pain, especially with a rigid abdomen
Fainting, severe weakness, confusion or difficulty breathing
Swelling of the face or throat after medicine
These signs may indicate major bleeding, a perforated ulcer or a serious allergic reaction.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek prompt medical advice if you have repeated vomiting, difficulty swallowing, unexplained weight loss, worsening pain, anaemia or symptoms that continue after treatment.
Contact the prescribing service if side effects prevent you from taking the treatment correctly.
3
Does any of this apply?
Book an appointment
Arrange a routine medical appointment if you have persistent or recurring upper abdominal pain, unexplained nausea, early fullness or indigestion.
These symptoms have many possible causes, and testing can help guide appropriate care.
Every sign above is quoted from the sofidex article on H. pylori. If you are not sure, err upward — it is always reasonable to be checked.