"I just finished 10 day. It was really hard. Tested positive for h.pylori after endoscopy, as well as, gastritis. No ulcers. Pylera really wrecked my stomach. Side effects for me: Metallic taste, nausea, dizziness, acid reflux, lack of appetite, excessive burping, sour stomach, gnawing gut, dark green stools. Recommend asking doctor for anti-nausea meds which helped a bit. Did not eat dairy, took probiotics everyday. Force feed yourself plain meals to help with meds. Also took omeprazole twice a day. Hope it gets better - so far I feel awful!"