An Open-Label, Multiple Dose Study to Evaluate the Pharmacology, Safety, and Tolerability of Patiromer in Participants on Hemodialysis

The initial intent was to enroll 12-24 adult male and female participants on hemodialysis
into the study. Due to significant recruitment challenges, the study was discontinued after
six participants were enrolled in the study.

This was an open-label, multiple-dose, adaptive-design study in participants on
hemodialysis. Eligible participants on hemodialysis were to remain in the Clinical Research
Unit for 2 weeks (Day -7 to Day 8) and were required to consume a potassium, magnesium,
calcium and sodium-controlled diet.

Inclusion Criteria:

- Participants on hemodialysis between the ages of 18 and 70 years, with serum
potassium levels of at least 5.5 mmol/L

- Adequately dialyzed (Kt/V ≥ 1.2)

Exclusion Criteria:

- History of bowel obstruction, swallowing disorders, severe gastrointestinal disorders
or major gastrointestinal surgery.

- Severe constipation or irregular bowel habits.

- Unable to consume or tolerate the study-specific diet.