rxstat › Shortages › Cromolyn
Cromolyn shortage status
Partial shortage
Source: Health Canada shortage reports · Updated Jul 9, 2026
Some Cromolyn products are in shortage in Canada (2 of 5 reported products), while others remain available. Your pharmacy may be able to substitute an unaffected manufacturer.
In shortage since
Mar 10, 2017
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 shortageAPO-CROMOLYN NASAL SPRAY
2% · SOLUTION
SPRAY · APOTEX INC
DIN 02231390 · since Mar 10, 2017, no end estimate · Disruption of the manufacture of the drug.
Active shortageAPO-CROMOLYN STERULES
1% · SOLUTION · APOTEX INC
DIN 02231431 · since Mar 10, 2017, no end estimate · Disruption of the manufacture of the drug.
ResolvedNALCROM
100MG · CAPSULE · SANOFI-AVENTIS CANADA INC
DIN 00500895 · ended Nov 7, 2022 · Other (Please describe in comments)
ResolvedNALCROM
100MG · CAPSULE · LUPIN PHARMA CANADA LIMITED
DIN 00500895 · ended Jan 5, 2026 · Demand increase for the drug.
ResolvedNALCROM
100MG · CAPSULE · SANOFI-AVENTIS CANADA INC
DIN 00500895 · ended Oct 4, 2024 · Other (Please describe in comments)
ResolvedNALCROM
100MG · CAPSULE · SANOFI-AVENTIS CANADA INC
DIN 00500895 · ended Jun 30, 2023 · Other (Please describe in comments)
DiscontinuedPMS-SODIUM CROMOGLYCATE
1% · SOLUTION · PHARMASCIENCE INC
DIN 02046113
ResolvedNALCROM
100MG · CAPSULE · SANOFI-AVENTIS CANADA INC
DIN 00500895 · ended Sep 23, 2022 · Other (Please describe in comments)
AvoidedPMS-SODIUM CROMOGLYCATE
1% · SOLUTION · PHARMASCIENCE INC
DIN 02046113 · ended Jan 18, 2022 · Other (Please describe in comments)
ResolvedNALCROM
100MG · CAPSULE · SANOFI-AVENTIS CANADA INC
DIN 00500895 · ended Apr 28, 2022 · Other (Please describe in comments)
ResolvedNALCROM
100MG · CAPSULE · SANOFI-AVENTIS CANADA INC
DIN 00500895 · ended Mar 25, 2022 · Delay in shipping of the drug.
ResolvedNALCROM
100MG · CAPSULE · SANOFI-AVENTIS CANADA INC
DIN 00500895 · ended May 21, 2021 · Other (Please describe in comments)
Showing 12 of 19 reports. All reports are on file with Health Canada.
What's happening
Cromolyn is currently affected by 2 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.
Cromolyn is classified under “INTESTINALANTIINFLAMMATORY AGENTS” (ATC A07EB).
Recent changes
Common questions
When will Cromolyn 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 Cromolyn 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.
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.