A phase 2, randomized, placebo-controlled, double-blind, dose-finding study of TS-172 in hyperphosphatemia patients on hemodialysis

Inclusion Criteria:

1. Hyperphosphatemia patients (outpatients) with chronic kidney disease receiving hemodialysis (HD or HDF) 3 times a week for at least 12 weeks prior to Visit 1 (Week -4)
2. Patients aged ≥18 to <80 years at the time of obtaining informed consent
3. Patients with a serum phosphorus concentration of ≥ 3.5 mg/dL and ≤ 6.0 mg/dL at Visit 1 (Week -4)

Exclusion Criteria:

1. Patients with confirmed serum intact PTH concentration >500 pg/mL from Visit 1 (Week -4) to Visit 5 (Week 0)
2. Patients with serum phosphorus concentration ≥ 10.0 mg/dL from Visit 2 (Week -3) to Visit 5 (Week 0)
3. Patients who have undergone previous parathyroid intervention (PTx, PEIT, etc.)