Source: Health Canada shortage reports · Updated Jul 27, 2026
Some Topiramate products are in shortage in Canada (7 of 40 reported products), while others remain available. Your pharmacy may be able to substitute an unaffected manufacturer.
An anticonvulsant used to treat epilepsy and prevent migraines.
Products affected
7 / 40
In shortage since
May 2, 2018
Reports on file
92
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
PMS-TOPIRAMATE
50MG · TABLET · PHARMASCIENCE INC
DIN 02312085 · since Jun 12, 2026, est. end Jul 25, 2026 · Disruption of the manufacture of the drug.
Active shortage
GLN-TOPIRAMATE
200MG · TABLET · GLENMARK PHARMACEUTICALS CANADA INC.
DIN 02287781 · since Apr 30, 2026, no end estimate · Disruption of the manufacture of the drug.
Active shortage
ACH-TOPIRAMATE
25MG · TABLET · ACCORD HEALTHCARE INC
DIN 02395738 · since Dec 27, 2023, no end estimate · Disruption of the manufacture of the drug.
Active shortage
ACH-TOPIRAMATE
100MG · TABLET · ACCORD HEALTHCARE INC
DIN 02395746 · since Feb 24, 2023, no end estimate · Disruption of the manufacture of the drug.
Active shortage
MAR-TOPIRAMATE
100MG · TABLET · MARCAN PHARMACEUTICALS INC
DIN 02432102 · since May 2, 2018, no end estimate · Delay in shipping of the drug.
Active shortage
MAR-TOPIRAMATE
100MG · TABLET · MARCAN PHARMACEUTICALS INC
DIN 02432102 · since Jul 10, 2018, no end estimate · Delay in shipping of the drug.
Active shortage
MAR-TOPIRAMATE
25MG · TABLET · MARCAN PHARMACEUTICALS INC
DIN 02432099 · since May 2, 2018, no end estimate · Delay in shipping of the drug.
Active shortage
MAR-TOPIRAMATE
200MG · TABLET · MARCAN PHARMACEUTICALS INC
DIN 02432110 · since May 2, 2018, no end estimate · Delay in shipping of the drug.
Anticipated
TOPIRAMATE
100MG · TABLET · SANIS HEALTH INC
DIN 02356864 · Disruption of the manufacture of the drug.
Anticipated
TOPIRAMATE
25MG · TABLET · SANIS HEALTH INC
DIN 02356856 · Disruption of the manufacture of the drug.
Discontinued
TOPAMAX 200MG
200MG · TABLET · JANSSEN INC
DIN 02230896
Discontinued
TOPAMAX 25MG
25MG · TABLET · JANSSEN INC
DIN 02230893
Showing 12 of 60 reports. All reports are on file with Health Canada.
What's happening
Topiramate is currently affected by 7 active shortage reports filed with Health Canada by PHARMASCIENCE INC, GLENMARK PHARMACEUTICALS CANADA INC., ACCORD HEALTHCARE INC, MARCAN PHARMACEUTICALS INC.
The reported causes are: disruption of the manufacture of the drug; delay in shipping 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.
Topiramate is classified under “ANTIEPILEPTICS” (ATC N03AX).
Recent changes
Jul 27, 2026
Status changed
Jul 27, 2026
Status changed
Jul 27, 2026
Status changed
Jul 13, 2026
Estimated end date pushed back : Jul 7, 2026 → Jul 25, 2026
Jul 13, 2026
New report filed
Jul 13, 2026
New report filed
Common questions
What is Topiramate used for?
An anticonvulsant used to treat epilepsy and prevent migraines.
When will Topiramate 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 Topiramate 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 (antiepileptics)
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.