Dantrolene (Dantrium, Dantrium Intravenous) shortage status
Partial shortage
Source: Health Canada shortage reports · Updated Jul 27, 2026
Some Dantrolene products are in shortage in Canada (1 of 4 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 Sep 30, 2026.
A muscle relaxant used to treat muscle spasticity and a rare reaction to anesthesia called malignant hyperthermia.
Products affected
1 / 4
In shortage since
Apr 20, 2026
Est. full return
Sep 30, 2026
Reports on file
12
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
DANTRIUM INTRAVENOUS
20MG · POWDER FOR SOLUTION · KNIGHT THERAPEUTICS INC.
DIN 01997572 · since Apr 20, 2026, est. end Sep 30, 2026 · Disruption of the manufacture of the drug.
Resolved
DANTROLENE SODIUM FOR INJECTION, USP
20MG · POWDER FOR SOLUTION · HIKMA CANADA LIMITED
DIN 02529998 · ended Jul 24, 2026 · Demand increase for the drug.
Resolved
DANTROLENE SODIUM FOR INJECTION, USP
20MG · POWDER FOR SOLUTION · HIKMA CANADA LIMITED
DIN 02529998 · ended Mar 26, 2026 · Disruption of the manufacture of the drug.
Resolved
DANTRIUM INTRAVENOUS
20MG · POWDER FOR SOLUTION · ENDO OPERATIONS LTD.
DIN 01997572 · ended Nov 7, 2025 · Demand increase for the drug.
Resolved
DANTROLENE SODIUM FOR INJECTION, USP
20MG · POWDER FOR SOLUTION · HIKMA CANADA LIMITED
DIN 02529998 · ended Sep 5, 2025 · Disruption of the manufacture of the drug.
Resolved
DANTROLENE SODIUM FOR INJECTION, USP
20MG · POWDER FOR SOLUTION · HIKMA CANADA LIMITED
DIN 02529998 · ended Aug 29, 2024 · Delay in shipping of the drug.
Resolved
DANTRIUM CAPSULES
25MG · CAPSULE · ENDO PAR INNOVATION COMPANY, LLC
DIN 01997602 · ended Feb 1, 2024 · Delay in shipping of the drug.
Resolved
DANTRIUM INTRAVENOUS
20MG · POWDER FOR SOLUTION · ENDO PAR INNOVATION COMPANY, LLC
DIN 01997572 · ended Jul 24, 2023 · Delay in shipping of the drug.
Resolved
DANTRIUM INTRAVENOUS
20MG · POWDER FOR SOLUTION · ENDO PAR INNOVATION COMPANY, LLC
DIN 01997572 · ended Dec 21, 2022 · Disruption of the manufacture of the drug.
Resolved
DANTRIUM INTRAVENOUS
20MG · POWDER FOR SOLUTION · PAR PHARMACEUTICAL COMPANIES
DIN 01997572 · ended Jul 30, 2018 · Demand increase for the drug.
Discontinued
DANTRIUM CAPSULES
100MG · CAPSULE · PAR PHARMACEUTICAL COMPANIES
DIN 01997653
Resolved
DANTRIUM CAPSULES
25MG · CAPSULE · PAR PHARMACEUTICAL COMPANIES
DIN 01997602 · ended Apr 20, 2017 · Shortage has been resolved
What's happening
Dantrolene is currently affected by an active shortage report filed with Health Canada by KNIGHT THERAPEUTICS INC..
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.
Dantrolene is classified under “MUSCLE RELAXANTS, DIRECTLY ACTING AGENTS” (ATC M03CA).
Recent changes
Jul 27, 2026
Shortage resolved
Common questions
What is Dantrolene used for?
A muscle relaxant used to treat muscle spasticity and a rare reaction to anesthesia called malignant hyperthermia.
When will Dantrolene be back in stock in Canada?
The latest manufacturer estimate is Sep 30, 2026. Estimates are self-reported and often slip; this page updates automatically when they change.
Why is Dantrolene 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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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.