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If you are sure that this is due to acidity , your friend needs antacids.Pantoprazole
injection if given at this time will reduce the acidity and symptoms very much.
Evaluation should be done to know the cause of such severe dyspepsia
.There could be a gastric ulcer too.Upper endoscopy
can diagnose it.
Hope I answered your question.If you need more information feel free to mail me.