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Your journey
1What's a trial
4Get in touch
More info
You can access this
clinical trial
if you have
Chronic Kidney Disease Requiring Chronic Dialysis
and you are
over 18
years old
This is a trial in the final phase before the treatment is released on the market.
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The purpose

This is a Phase 3, randomised, active controlled, multicentre extension study to investigate the long-term safety and efficacy of PA21, a phosphate binder, for control of hyperphosphataemia in dialysis patients. This is an extension study to PA-CL-05A (NCT01324128), subjects have already been enrolled and have been treated with study medication for at least 24 weeks.

Provided treatments

  • Drug: PA21 (2.5 g tablet containing 500 mg iron)
  • Drug: Sevelamer carbonate

Locations near you

Unfortunately, there are no recruiting locations near you. Please check the list with all locations below.
Tris trial is registered with FDA with number: NCT01464190. The sponsor of the trial is Vifor Inc. and it is looking for 659 volunteers for the current phase.
Official trial title:
An Open-label, Randomised, Active-controlled, Parallel Group, Multicentre Phase 3 Study to Investigate the Long-term Safety, Tolerability and Efficacy of PA21 Compared With Sevelamer Carbonate in Dialysis Patients With Hyperphosphataemia. Extension Study for Protocol PA-CL-05A (NCT01324128)