The effect of dosing with omeprazole on the accuracy of the ¹³C‐urea breath test in <i>Helicobacter pylori</i>‐infected subjects

Abstract

False negative 13C-UBTs are common during treatment with omeprazole and occur after as little as 7 days. Return to positive test results is rapid after cessation of omeprazole. These findings are relevant to the timing of testing in clinical practice.