Disopyramide (Rythmodan) shortage status

Widespread shortage Tier 3: critical

Source: Health Canada shortage reports · Updated Jul 9, 2026

Disopyramide is in a widespread shortage in Canada. 1 of 1 reported products are affected, and Health Canada has designated this a Tier 3 (most serious) shortage. Manufacturers have not committed to a recovery date.

An antiarrhythmic medication used to treat abnormal heart rhythms.

Products affected

1 / 1

In shortage since

Jan 24, 2025

Reports on file

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.

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When every manufacturer is affected, an online doctor can assess your situation and prescribe an alternative.

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Shortage history

Shortage history (red bands = periods in shortage).

Reports by product

The DIN is printed on your prescription label.

Active shortage

RYTHMODAN

100MG · CAPSULE · CHEPLAPHARM ARZNEIMITTEL GMBH

DIN 02224801 · since Jan 24, 2025, no end estimate · Disruption of the manufacture of the drug.

Resolved

RYTHMODAN

100MG · CAPSULE · CHEPLAPHARM ARZNEIMITTEL GMBH

DIN 02224801 · ended Mar 8, 2022 · Disruption of the manufacture of the drug.

What's happening

Disopyramide is currently affected by an active shortage report filed with Health Canada by CHEPLAPHARM ARZNEIMITTEL GMBH.

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.

Health Canada has flagged this as a Tier 3 shortage, its most serious category, meaning the shortage has the greatest potential impact on the health system and alternatives are limited.

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.

Disopyramide is classified under “ANTIARRHYTHMICS, CLASS I AND III” (ATC C01BA).

Recent changes

No changes recorded yet.

Common questions

What is Disopyramide used for?

An antiarrhythmic medication used to treat abnormal heart rhythms.

When will Disopyramide 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 Disopyramide 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 (antiarrhythmics, class i and iii)

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.

Amiodarone No current shortage Mexiletine No current shortage Flecainide Partial shortage 1 of 8 reported products affected Lidocaine (Xylocaine) Partial shortage 2 of 24 reported products affected Propafenone (Rythmol) Shortage anticipated 0 of 12 reported products affected Procainamide (Procan) Widespread shortage 4 of 5 reported products affected

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.