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Olsalazine (Dipentum) shortage status

Partial shortage

Source: Health Canada shortage reports · Updated Jul 27, 2026

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

An anti-inflammatory medicine used to treat ulcerative colitis.

Products affected
1 / 1
In shortage since
Jul 5, 2022
Reports on file
4
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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

2023 2024 2025 2026

Shortage history (red bands = periods in shortage).

Reports by product

The DIN is printed on your prescription label.

Active shortage
DIPENTUM
250MG · CAPSULE · ATNAHS PHARMA UK LIMITED
DIN 02063808 · since Jul 5, 2022, est. end Apr 1, 2026 · .
Resolved
DIPENTUM
250MG · CAPSULE · ATNAHS PHARMA UK LIMITED
DIN 02063808 · ended Jun 17, 2026 · Delay due to Technical Transfer
Resolved
DIPENTUM
250MG · CAPSULE · ATNAHS PHARMA UK LIMITED
DIN 02063808 · ended Jun 17, 2026 · Delay due to technical transfer.
Resolved
DIPENTUM
250MG · CAPSULE · ATNAHS PHARMA UK LIMITED
DIN 02063808 · ended Nov 24, 2023 · N/A

What's happening

Olsalazine is currently affected by an active shortage report filed with Health Canada by ATNAHS PHARMA UK LIMITED.

The reported cause is: . 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.

Olsalazine is classified under “INTESTINALANTIINFLAMMATORY AGENTS” (ATC A07EC).

Recent changes

Common questions

What is Olsalazine used for?

An anti-inflammatory medicine used to treat ulcerative colitis.

When will Olsalazine 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 Olsalazine 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 (intestinalantiinflammatory agents)

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.

Cromolyn (Opticrom) Partial shortage 2 of 5 reported products affected Mesalazine (Salofalk) Shortage anticipated 0 of 11 reported products affected

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.