rxstatShortages › Polystyrene Sulfonate

Polystyrene Sulfonate (Resonium Calcium) shortage status

Partial shortage

Source: Health Canada shortage reports · Updated Jul 9, 2026

Some Polystyrene Sulfonate products are in shortage in Canada (1 of 2 reported products), while others remain available. Your pharmacy may be able to substitute an unaffected manufacturer.

A medicine used to lower high potassium levels in the blood.

Products affected
1 / 2
In shortage since
Oct 16, 2023
Reports on file
5
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Pharmacists can substitute an unaffected manufacturer's version, adjust strengths, and in most provinces adapt or renew a prescription on the spot.
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Shortage history

2024 2025 2026

Shortage history (red bands = periods in shortage).

Reports by product

The DIN is printed on your prescription label.

Active shortage
JAMP CALCIUM POLYSTYRENE SULFONATE
999MG · POWDER FOR SUSPENSION · JAMP PHARMA CORPORATION
DIN 02502631 · since Oct 16, 2023, no end estimate · Disruption of the manufacture of the drug.
Resolved
RESONIUM CALCIUM
999MG · POWDER FOR SOLUTION · SANOFI-AVENTIS CANADA INC
DIN 02017741 · ended May 13, 2026
Resolved
RESONIUM CALCIUM
999MG · POWDER FOR SOLUTION · SANOFI-AVENTIS CANADA INC
DIN 02017741 · ended Feb 22, 2024 · Demand increase for the drug.
Resolved
RESONIUM CALCIUM
999MG · POWDER FOR SOLUTION · SANOFI-AVENTIS CANADA INC
DIN 02017741 · ended May 21, 2021
Resolved
RESONIUM CALCIUM
999MG · POWDER FOR SOLUTION · SANOFI-AVENTIS CANADA INC
DIN 02017741 · ended Aug 13, 2019 · Delay in shipping of the drug.

What's happening

Polystyrene Sulfonate is currently affected by an active shortage report filed with Health Canada by JAMP PHARMA CORPORATION.

The reported cause is: disruption of the manufacture of the drug. Manufacturers must report shortages, but end-date estimates are their own projections and often move.

If your usual product is affected, a pharmacist is the fastest route to a solution: they can dispense an unaffected manufacturer's equivalent when one exists, and in most provinces can adapt doses or substitute a therapeutic alternative without a new appointment.

Polystyrene Sulfonate is classified under “ALL OTHER THERAPEUTIC PRODUCTS” (ATC V03AE).

Recent changes

Common questions

What is Polystyrene Sulfonate used for?

A medicine used to lower high potassium levels in the blood.

When will Polystyrene Sulfonate be back in stock in Canada?

Manufacturers have not provided a reliable end date. This page updates automatically as soon as an estimate is filed.

Why is Polystyrene Sulfonate in shortage?

See the reports above; manufacturers must state a reason (most commonly manufacturing disruption or a surge in demand) when filing with Health Canada.

What can my pharmacist do about it?

Often quite a lot: substitute an equivalent product from an unaffected manufacturer, adjust quantities, or in most provinces adapt or renew prescriptions on the spot. Call your pharmacy before visiting, and call 811 for free health advice.

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Possible alternatives in the same class (all other therapeutic products)

Drugs in the same therapeutic class, best-supplied first. These are not automatic substitutes: only your pharmacist or prescriber can judge whether a switch makes sense for you.

Guides: what to do when your medication is in shortage · how to read shortage reports

Data reflects reports manufacturers are legally required to file with Health Canada, republished with per-drug aggregation by rxstat. Estimated end dates are supplied by manufacturers and frequently change. This page describes drug supply only and is not medical advice; never stop or switch a medication without speaking to your pharmacist or prescriber.