I had quadruple therapy it was the best effective against H.Pylori of 90%. The medications I was taking was as Antibiotics they were Metronidazole and Clarithromycin: my GP doctor also given me (b i s m u t h) its like a tablet that it will protect the ulcer and it will also change your toilet poo color for while: Also I was given pepto bismol its like gaviscon, as well I was taking PPI, I chosen lansoprazole to take. The Course was two weeks, I had to take Antibiotics four times daily. What I did was I took all medication in the morning and afternoon and evening before food, I than given 1 hour exactly as empty stomach, and than I have start to eat food, food I was eating was pure vegetables as boiled, brocolli is very good for you and helps to kill H.Pyrl as well. Also don't have milk and yogurt for 2 weeks. Drink water only as a lot, no fizzy drinks.
I have twice negative as H.Pylori and as well my poo is normal and its not black color or smelly, and no smelly taste in my mouth.
Quadruple Therapy is very strong and effective.
Did you take all 4 meds at the same time? I heard Pepto Bismol can cancel out the effectiveness of antiobiotics if taken at the same time?