Source: Health Canada shortage reports · Updated Jul 16, 2026
Some Guanfacine products are in shortage in Canada (4 of 10 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 Aug 3, 2026.
A medication used to treat ADHD and sometimes high blood pressure.
Products affected
4 / 10
In shortage since
Jun 2, 2026
Est. full return
Aug 3, 2026
Reports on file
26
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
APO-GUANFACINE XR
2MG · TABLET (EXTENDED-RELEASE) · APOTEX INC
DIN 02523736 · since Jun 16, 2026, est. end Jul 17, 2026 · Disruption of the manufacture of the drug.
Active shortage
APO-GUANFACINE XR
1MG · TABLET (EXTENDED-RELEASE) · APOTEX INC
DIN 02523728 · since Jun 2, 2026, est. end Jul 24, 2026 · Disruption of the manufacture of the drug.
Active shortage
APO-GUANFACINE XR
1MG · TABLET (EXTENDED-RELEASE) · APOTEX INC
DIN 02523728 · since Jun 2, 2026, est. end Jul 24, 2026 · Disruption of the manufacture of the drug.
Active shortage
APO-GUANFACINE XR
4MG · TABLET (EXTENDED-RELEASE) · APOTEX INC
DIN 02523752 · since Jun 30, 2026, est. end Jul 31, 2026 · Disruption of the manufacture of the drug.
Active shortage
APO-GUANFACINE XR
3MG · TABLET (EXTENDED-RELEASE) · APOTEX INC
DIN 02523744 · since Jun 16, 2026, est. end Aug 3, 2026 · Disruption of the manufacture of the drug.
Resolved
APO-GUANFACINE XR
4MG · TABLET (EXTENDED-RELEASE) · APOTEX INC
DIN 02523752 · ended Sep 11, 2025 · Disruption of the manufacture of the drug.
DIN 02409127 · ended Apr 29, 2025 · Delay in shipping of the drug.
Showing 12 of 26 reports. All reports are on file with Health Canada.
What's happening
Guanfacine is currently affected by 4 active shortage reports filed with Health Canada by APOTEX 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.
Guanfacine is classified under “ANTIADRENERGIC AGENTS, CENTRALLY ACTING” (ATC C02AC).
Recent changes
Jul 9, 2026
Estimated end date moved earlier : Jul 31, 2026 → Jul 17, 2026
Common questions
What is Guanfacine used for?
A medication used to treat ADHD and sometimes high blood pressure.
When will Guanfacine be back in stock in Canada?
The latest manufacturer estimate is Aug 3, 2026. Estimates are self-reported and often slip; this page updates automatically when they change.
Why is Guanfacine 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.