First of all shuts down acid secretion completely./
If you had to take something else temporarily, I would use gaviscon, as it works differently.
However, this need to be evalued by your doctor.
Tightness in the chest requires an EKG.
The lack of effectiveness of your therapy needs to be evaluated.
Backache can indicate a more severe problem, such as penetrating ulcer.
I suggest an immediate exam.
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