The Safety, Tolerability, Systemic Exposure, and Effect on Bowel Habits of Single and Multiple Doses of the Intestinal Sodium Re-Uptake Inhibitor RDX5791 in Normal Healthy Volunteers. Rosenbaum, David P; Spencer, Andrew G.; Jacobs, Jeffrey W.; Charmot, Dominique, Ardelyx, Inc., Fremont, CA, United States