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Arsenic Trioxide shortage status

Partial shortage

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

Some Arsenic Trioxide products are in shortage in Canada (1 of 3 reported products), while others remain available. Your pharmacy may be able to substitute an unaffected manufacturer.
Products affected
1 of 3
In shortage since
May 13, 2020
Reports on file
5
Talk to your pharmacist. Pharmacists can often substitute another manufacturer's version, a different strength, or (in most provinces) adapt or renew a prescription on the spot. Your free provincial health line is 811.

Reports by product

Active shortage
TRISENOX
10MG · SOLUTION · TEVA CANADA LIMITED
DIN 02407833 · since May 13, 2020, no end estimate · Other (Please describe in comments)
Resolved
ARSENIC TRIOXIDE FOR INJECTION
1MG · SOLUTION · STERIMAX INC
DIN 02492768 · ended Jan 20, 2026 · Disruption of the manufacture of the drug.
Resolved
ARSENIC TRIOXIDE FOR INJECTION
10MG · SOLUTION · SANDOZ CANADA INCORPORATED
DIN 02513420 · ended Feb 23, 2026 · Demand increase for the drug.
Resolved
ARSENIC TRIOXIDE FOR INJECTION
10MG · SOLUTION · SANDOZ CANADA INCORPORATED
DIN 02513420 · ended Dec 9, 2024 · Disruption of the manufacture of the drug.
Resolved
TRISENOX
1MG · SOLUTION · LUNDBECK CANADA INC
DIN 02407833 · ended Jul 24, 2018 · Disruption of the manufacture of the drug.

What's happening

Arsenic Trioxide is currently affected by an active shortage report filed with Health Canada by TEVA CANADA LIMITED.

The reported cause is: other (please describe in comments). 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.

Arsenic Trioxide is classified under “OTHER ANTINEOPLASTIC AGENTS” (ATC L01XX).

Recent changes

Common questions

When will Arsenic Trioxide 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 Arsenic Trioxide 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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All other antineoplastic agents shortage statuses →

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.