Source: Health Canada shortage reports · Updated Aug 4, 2026
Some Ketotifen 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. The latest estimate for affected products to return is Feb 1, 2027.
An antihistamine used to relieve allergy symptoms, including itchy eyes.
Products affected
1 / 3
In shortage since
Jul 14, 2026
Est. full return
Feb 1, 2027
Reports on file
9
Talk to a pharmacist
Pharmacists can substitute an unaffected manufacturer's version, adjust strengths, and in most provinces adapt or renew a prescription on the spot.
Independent services, not affiliated with rxstat; referral fees may apply. Free options exist depending on your province. In an emergency call 911; free health advice at 811.
Shortage history
Shortage history (red bands = periods in shortage).
Reports by product
The DIN is printed on your prescription label.
Active shortage
ZADITOR
0.25MG · SOLUTION · LABORATOIRES THEA
DIN 02242324 · since Jul 14, 2026, est. end Feb 1, 2027 · Disruption of the manufacture of the drug.
Resolved
ZADITEN
1MG · TABLET · TEVA CANADA LIMITED
DIN 00577308 · ended Mar 18, 2026 · Disruption of the manufacture of the drug.
Resolved
ZADITOR
0.25MG · SOLUTION · LABORATOIRES THEA
DIN 02242324 · ended Jun 19, 2025 · Delay in shipping of the drug.
Resolved
ZADITOR
0.25MG · SOLUTION · LABORATOIRES THEA
DIN 02242324 · ended Dec 19, 2024 · Delay in shipping of the drug.
Resolved
ZADITEN
1MG · TABLET · TEVA CANADA LIMITED
DIN 00577308 · ended Apr 14, 2023 · Disruption of the manufacture of the drug.
Resolved
ZADITEN
1MG · TABLET · TEVA CANADA LIMITED
DIN 00577308 · ended Jul 27, 2021 · Disruption of the manufacture of the drug.
Resolved
ZADITEN
1MG · TABLET · TEVA CANADA LIMITED
DIN 00577308 · ended Jan 13, 2021 · Disruption of the manufacture of the drug.
Resolved
KETOTIFEN OPHTHALMIC SOLUTION
0.25MG · SOLUTION · STERIMAX INC
DIN 02400871 · ended Jun 27, 2019 · Delay in shipping of the drug.
Resolved
KETOTIFEN OPHTHALMIC SOLUTION
0.25MG · SOLUTION · STERIMAX INC
DIN 02400871 · ended Aug 14, 2017 · Product is available
What's happening
Ketotifen is currently affected by an active shortage report filed with Health Canada by LABORATOIRES THEA.
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.
Ketotifen is classified under “ANTIHISTAMINES FOR SYSTEMIC USE” (ATC R06AX).
Recent changes
Aug 4, 2026
Status changed
Jul 14, 2026
New report filed
Common questions
What is Ketotifen used for?
An antihistamine used to relieve allergy symptoms, including itchy eyes.
When will Ketotifen be back in stock in Canada?
The latest manufacturer estimate is Feb 1, 2027. Estimates are self-reported and often slip; this page updates automatically when they change.
Why is Ketotifen 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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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.
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.