Potassium-sparing diuretic / aldosterone antagonist
Spironolactone in Canada: prescription, brands, pricing
This page summarises the situation of Spironolactone in Canada under Health Canada: prescription status, available brands and generics, pharmacy dispensing, and online options in CAD. Spironolactone belongs to the Potassium-sparing diuretic / aldosterone antagonist class.
- Regulator
- Health Canada
- Currency
- CAD
About Spironolactone
Spironolactone is approved for heart failure with reduced ejection fraction, primary hyperaldosteronism, resistant hypertension, oedema in cirrhosis or nephrotic syndrome, and certain potassium-loss states. Canada classifies medications as Schedule I (prescription), II (pharmacist-only OTC), III (open OTC) or unscheduled, with provincial variation. Provincial drug plans cover prescription costs at varying rates.
Mechanism and action
Spironolactone competitively blocks the mineralocorticoid (aldosterone) receptor in the distal tubule of the kidney, reducing sodium reabsorption and potassium excretion.
Brands and generics in Canada
In Canada, Spironolactone is typically dispensed as one internationally recognised brand along with their corresponding authorised generics. Canadian pharmacies (Shoppers Drug Mart, Rexall, London Drugs and many independents) are licensed provincially, and pharmacists in several provinces can prescribe for minor ailments. Brand-to-generic substitution is decided by the pharmacist under local Health Canada equivalence rules, and the price difference in CAD is usually substantial.
Online and tele-prescribing access
Online pharmacy is regulated provincially in Canada; cross-border imports are restricted. Tele-prescribing platforms have expanded prescription access since 2020. For Spironolactone specifically, the legal online options in Canada depend on its Rx-or-OTC classification under Health Canada.
Frequently asked questions
Is Spironolactone available in Canada? ▾
Yes — Spironolactone and its brands are available in Canada through pharmacies authorised by Health Canada, in various strengths depending on the commercial product. Authorised generics offer a lower-cost alternative with the same active substance.
Do I need a prescription for Spironolactone in Canada? ▾
Canada classifies medications as Schedule I (prescription), II (pharmacist-only OTC), III (open OTC) or unscheduled, with provincial variation. Provincial drug plans cover prescription costs at varying rates. The exact status of Spironolactone (Rx or OTC) is determined by Health Canada; most active ingredients in the Potassium-sparing diuretic / aldosterone antagonist class require prescription, although there are exceptions by country and formulation.
How much does Spironolactone cost in Canada? ▾
The price in CAD depends on the manufacturer (brand vs authorised generic), the strength and the pack size. Generics are typically substantially cheaper than brands and serve as the economic reference for ongoing use.
Products with Spironolactone in Canada
Spironolactone in other countries
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.