Acid Suppression
A single-center, double-blind, placebo-controlled, randomized crossover study in healthy H. pylori-negative male subjects (N=24). Analysis was performed in 23 evaluable subjects.

ACIPHEX significantly maintained gastric pH>4 for 44% and 60% of the 24-hour period on day 1 and day 8, respectively.1,2
THE CORRELATION OF THESE PHARMACODYNAMIC DATA TO CLINICAL EFFECT HAS NOT BEEN ESTABLISHED.
A single-center, double-blind, randomized, 2-way crossover study of 20- and 40-mg rabeprazole in GERD patients (N=20). In the 20-mg arm, percentage of time esophageal pH<4 decreased from a baseline of 24.7% to 5.1% on day 7.

THE CORRELATION OF THESE PHARMACODYNAMIC DATA
TO CLINICAL EFFECT HAS NOT BEEN ESTABLISHED.
