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Supply issue: calcium polystyrene sulphonate (Calcium Resonium)



Kia ora

 

Supply issue:

 

We are writing to inform you of a supply issue. Due to a delay with manufacturing the supplier of calcium polystyrene sulphonate (Calcium Resonium), has advised it anticipates an out of stock between late-February and May 2026.

 

Key Date:


An alternative product Calcium polystyrene sulphonate Powder, (Roma brand) will be funded from 1 February 2026, under Section 29A of the Medicines Act.

 

Key Differences:

 

  • Both products are the same strength, however the strength is expressed differently:

    • The new product is labelled 99.934 % w/w with each 100g of powder containing 99.934g of calcium polystyrene sulfonate

    • The current product is labelled 999.3 mg/g with each 15g of powder containing calcium polystyrene sulfonate 14.99g

  • Preparation of the alternate Roma product: The suspension should be prepared immediately before use.

  • Preparation of the current Calcium Resonium product: Suspensions of the resin should be freshly prepared and not stored beyond 24 hours.


 

Thank you for your support managing this supply issue, please reassure patients the strength of this medicine remains the same.

 

Questions: 

If you have any queries, please contact us at enquiry@pharmac.govt.nz

 

Please share this information:

Please share this information with your colleagues and within your networks.


Ngā mihi,

 

Anna I Senior Advisor Implementation

Pharmac | Te Pātaka Whaioranga | PO Box 10 254 | Level 9, 40 Mercer Street, Wellington

P: 0800 660 050 | www.pharmac.govt.nz


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