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H pylori is treated with a combination of two antibiotics, beside
Prevpac, this is usually metronidazole or clarithromycin. After the
treatment, another breath test is recommended to see, if infection is cured.
Bright red blood in the stool is urgent situation. Do you think it may be from hemorrhoids? Red blood is definitively from the part of the gut under the stomach - from small or large intestine. You should visit a doctor.
Strange taste may be from drugs, you've taken.