Have been using since 1998, ten years, 10gm per day, stops most all heartburn but does have some side effects. I have a warm discomfort high around waist and mild sweating. MD said if I stopped it would take 5-8 days to leave system, and the diet must be very non acid generating, like yogurt, jello, fresh fruit and apple juice, no orange or citric juices. He said some people then add 1 teaspoon of Aloe Gel after meals and take Zinc-L-Carnosine (PepZin) twice daily. Have used this technique for 3 weeks, all discomfort, except for mild sweating has gone. Remember, acid blockers, acid pumps, and anti acids only stop the acid, they do not do much for healing. Be kind to your tummy, no booze, coffee, pain pills etc.