Hi sir / mam suffering for few months huge acidity prbolem , sometime chest burn and pain . After taking lunch feel fullness and boalting. And stool colour also change sometime black some time other colours. Loose also weight 3-4 kg. What's the actual problem. My gp suggested me take flagyl 400 mg 3 times for 5 days, doxt 100 mg for 10 days, albendazole for 1 day and librax for 20 days. Pls suggest me .