Lasix (Furosemide) Tablets: What to Know Before You Buy

Lasix
Generic:
Furosemide
Indications:
congestive heart failure hypertension swelling
Analogs:
Furosemide Bumetanide Torsemide Ethacrynic Acid Hydrochlorothiazide Chlorthalidone Indapamide Spironolactone Bumex Demadex Edecrin Aldactone Metolazone
Lasix (furosemide) is a potent loop diuretic that typically produces a faster, more pronounced increase in urine output than thiazide-type diuretics. This makes it a different practical choice for significant fluid retention and resistant edema rather than routine blood-pressure control. We offer oral tablets in 40 mg and 100 mg strengths and package quantities from 10 to 360 pills. Furosemide remains a prescription medicine in Canada, while our separate ordering policy does not require a prescription for us to accept an order for this product.
In stock: 16 packs
AdultsPregnancyAllergiesDiabetesBreastfeedingChildrenDriving

Dosages

Lasix 40 mg

Quantity Price per tablet You save Total price
10 C$8.68 - C$86.80
20 C$4.90 C$75.60 C$98.00
30 C$3.64 C$151.20 C$109.20
60 C$2.01 C$400.40 C$120.40
90 C$1.46 C$649.60 C$131.60
120 C$1.18 C$900.20 C$141.40
180 C$0.85 C$1,409.80 C$152.60
270 C$0.64 C$2,170.00 C$173.60
360 C$0.54 C$2,928.80 C$196.00

Lasix 100 mg

Quantity Price per tablet You save Total price
10 C$8.82 - C$88.20
20 C$4.83 C$79.80 C$96.60
30 C$3.59 C$156.80 C$107.80
60 C$1.96 C$411.60 C$117.60
90 C$1.52 C$656.60 C$137.20
120 C$1.30 C$903.00 C$155.40
180 C$0.97 C$1,412.60 C$175.00
270 C$0.87 C$2,147.60 C$233.80
360 C$0.76 C$2,902.20 C$273.00

Manufacturers

ApotexApotex Inc.Aventis Pharma LimitedGeno Pharmaceuticals LimitedHexal AGMedibest Pharma Pvt. Ltd.ratiopharmratiopharm GmbHSanofiSanofi-AventisSanofi-Aventis AustraliaSanofi-Aventis Australia Pty LtdSanofi-Aventis CanadaSanofi-Aventis Canada Inc.Sanofi-Aventis DeutschlandSanofi-Aventis Deutschland GmbHSanofi-Aventis FranceSanofi-Aventis, S.A.Sanofi-Aventis U.S. LLCSanofi S.r.l.Sanofi Winthrop IndustrieTeva CanadaValidus Pharmaceuticals

Payment & Shipping

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Shipping Times
Shipping MethodEstimated delivery
Express Free for orders over C$420.00Estimated delivery to Canada: 4-7 days
Standard Free for orders over C$280.00Estimated delivery to Canada: 14-21 days
EMSCanada Post
Payment Methods
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Discount Coupons

  • Victoria Day - May 18, 2026 8% VICTORIA8
  • Canada Day - July 1, 2026 10% CANADADAY10
  • Labour Day - September 7, 2026 6% LABOUR6
  • Thanksgiving (Canada) - October 12, 2026 9% THANKS9
  • Boxing Day - December 26, 2026 12% BOXING12

Brand Names

Also known as (by country):
CountryBrand Names
Canada
Apo-Furosemide
France
Lasilix
New Zealand
Diurin Frusid
Germany
Furorese Furosemid ratiopharm
Belgium
Docfurose Furotop

FAQ

Yes. These tablets contain furosemide, the active ingredient associated with the Lasix name. They are available in 40 mg and 100 mg strengths. The manufacturer, tablet appearance, and inactive ingredients may differ from a brand-name product.

During pregnancy, furosemide should be used only when a clinician decides that the expected benefit justifies potential fetal risk; it crosses the placenta and is not used routinely for normal pregnancy swelling. Breastfeeding is not recommended during treatment because furosemide passes into breast milk and may reduce milk production.

Furosemide is a loop diuretic used to treat fluid retention, also called edema, associated with conditions such as heart failure, liver disease, or kidney disease. Oral furosemide may also be used to manage high blood pressure. It works by increasing the kidneys' removal of sodium and water.

Description

Lasix is the brand name for furosemide, a potent loop diuretic used to remove excess fluid and, in some circumstances, help manage high blood pressure. The most important distinction when comparing diuretics is how they act: furosemide works in the loop of Henle in the kidney and usually produces a faster, more pronounced increase in urine output than thiazide-type diuretics. That difference can make Lasix appropriate for significant fluid retention, but it does not make it the best diuretic for every person or every blood-pressure treatment plan.

Lasix at a Glance: A Potent Loop Diuretic

Furosemide belongs to the loop-diuretic class, sometimes described as a group of strong "water pills." It is established for conditions involving fluid overload, including congestive heart failure and substantial swelling or edema, and it may also be used for hypertension in selected patients. Thiazide-type diuretics are generally preferred for uncomplicated, long-term hypertension because their effect is steadier and less abrupt. By contrast, a prescriber may select furosemide when removing excess fluid is the more immediate priority or when edema has not responded adequately to a less potent approach.

This distinction matters before ordering because Lasix should not be viewed as an interchangeable substitute for every other diuretic. The underlying condition, kidney function, electrolyte levels, other medicines, and required intensity of fluid removal all influence the choice.

Lasix Compared With Other Diuretics

Furosemide is one of several diuretics used in Canada, and each class has a different practical role. Hydrochlorothiazide, Chlorthalidone, and Indapamide are thiazide or thiazide-like diuretics commonly considered for sustained blood-pressure control. Bumetanide and Torsemide are loop diuretics like furosemide, but their potency, duration, and dose equivalence differ. Spironolactone is a potassium-sparing diuretic used in settings such as heart failure, resistant hypertension, or excess aldosterone; it is not simply a milder version of Lasix.

Key differences between Lasix and spironolactone

CriterionLasixSpironolactone
Active ingredientFurosemideSpironolactone
Medicine classLoop diureticPotassium-sparing diuretic
Common useHypertension, oedemaHypertension, oedema, heart failure
Dosage formTabletsTablets
Available strengths40 mg, 100 mg25 mg, 50 mg, 100 mg
Potassium effectMay lower potassiumMay raise potassium

The comparison is therefore conditional rather than a matter of one universally superior product:

  • A loop diuretic such as furosemide may be preferred when clinically significant fluid retention requires a strong diuretic effect.
  • A thiazide-type diuretic may be more suitable when the principal goal is steady, long-term management of uncomplicated hypertension.
  • A potassium-sparing medicine such as Spironolactone may be selected for a different clinical purpose or combined with other treatment when a prescriber considers it appropriate.

Key differences between Lasix and torsemide

CriterionLasixTorsemide
Active ingredientFurosemideTorsemide
Medicine classLoop diureticLoop diuretic
Common useHypertension, oedemaHypertension, oedema
Dosage formTabletsTablets
Available strengths40 mg, 100 mg5 mg, 10 mg, 20 mg, 100 mg

Switching between these medicines is not a simple pill-for-pill exchange. Dose equivalence, potassium effects, kidney function, and monitoring requirements differ, so any change should be directed by a prescriber.

Key differences between Lasix and hydrochlorothiazide

CriterionLasixHydrochlorothiazide
Active ingredientFurosemideHydrochlorothiazide
Medicine classLoop diureticThiazide diuretic
Common useHypertension, oedemaHypertension, oedema
Dosage formTabletsTablets
Available strengths40 mg, 100 mg12.5 mg, 25 mg

What the Tablet Format and Strength Range Offer

We offer Lasix as oral tablets in two strengths: 40 mg and 100 mg. Having two strengths allows a prescriber to individualize treatment rather than rely on one fixed amount. The 40 mg tablet is commonly used within adult dosing plans, while the 100 mg strength is generally reserved for people with resistant edema or impaired renal function who require a higher prescribed dose. A higher strength is not automatically more effective or more appropriate for a particular customer.

Furosemide is also available in injectable forms for clinical use, but our current Lasix product is an oral tablet intended for prescribed treatment outside an acute-care administration setting. Injectable furosemide is administered and adjusted by health professionals when rapid or closely supervised treatment is required; it is not equivalent to independently increasing an oral tablet dose.

How Furosemide Works and What That Means Day to Day

Furosemide blocks the reabsorption of sodium and chloride in the loop of Henle. More salt and water then pass into the urine, reducing excess fluid in the tissues and circulation. After an oral dose, the diuretic effect commonly begins within about 30 minutes to one hour and lasts for several hours, although timing and response vary with the dose, kidney function, food, and the individual.

This timing explains why a once-daily dose is often taken in the morning. If more than one daily dose is prescribed, the later dose may be scheduled in the early afternoon to reduce sleep disruption from nighttime urination. The medicine can alter fluid balance, blood pressure, kidney function, and blood levels of sodium, potassium, and other electrolytes, so monitoring is a routine part of treatment rather than an optional extra.

Available Lasix Options and Package Value

For both the 40 mg and 100 mg strengths, we offer package quantities of 10, 20, 30, 60, 90, 120, 180, 270, and 360 pills. A smaller quantity may suit a short prescribed supply, while a larger package may be practical for stable, ongoing treatment when the prescribed strength and dose are unlikely to change. Customers should choose a quantity that matches their treatment plan rather than changing the dose or duration to fit a package.

Larger packages may provide a lower cost per pill, but the best value depends on the current price, prescribed duration, and likelihood that treatment will be adjusted. We show package prices and available savings with the product options, and our checkout provides the authoritative total in the selected checkout currency.

Compare package values for Lasix 40 mg tablets

Lasix Access and Prescription Status in Canada

Furosemide is a prescription medicine in Canada and ordinarily requires authorization from an authorized prescriber. Health Canada oversees federal drug authorization and post-market safety monitoring, while pharmacy practice and online pharmacy operations are regulated provincially or territorially. Suspected adverse reactions may be reported through the Canada Vigilance Program.

Public coverage is not automatic across Canada. Eligibility and formulary rules vary among provincial and territorial drug plans, federal programs, private insurance, and employer benefits. A listing for generic furosemide also does not necessarily establish coverage for every brand, strength, package, or source of supply.

That Canadian regulatory classification is separate from our ordering policy. We do not require a prescription for us to accept an order for this product. Our checkout requirement does not change furosemide's prescription status in Canada or replace individualized advice from a prescriber or pharmacist.

Practical Use: Dose, Timing, and Administration

Furosemide doses are individualized. The objective is generally to use the lowest dose that adequately controls edema or blood pressure while limiting excessive fluid and electrolyte loss. Customers should follow their prescribed directions and any individualized instructions about fluid or salt intake; a universal recommendation to drink extra water is not appropriate because some people taking a diuretic also have a fluid restriction.

  • Take each dose at a consistent time, usually in the morning when it is prescribed once daily.
  • If a second daily dose is prescribed, ask when to take it so increased urination is less likely to disrupt sleep.
  • Do not divide, increase, reduce, or switch between the 40 mg and 100 mg strengths unless a prescriber or pharmacist confirms the change.
  • Attend recommended blood tests and blood-pressure checks to monitor electrolytes and kidney function.
  • Track body weight if instructed, and report a rapid unexplained change according to the care plan provided by the treating clinician.

If a dose is missed, the appropriate response can depend on the dosing schedule and how close it is to the next dose. Customers should follow the product directions or ask a pharmacist rather than doubling the next dose.

Interactions and Safety Considerations

Furosemide can interact with prescription medicines, non-prescription pain relievers, and supplements. A prescriber or pharmacist should review the complete medication list, particularly when treatment is started or changed.

  • NSAIDs such as ibuprofen or naproxen may reduce the diuretic effect and increase kidney risk, especially with dehydration or regular combined use.
  • Lithium levels may rise, increasing the risk of lithium toxicity.
  • Aminoglycoside antibiotics may increase the risk of hearing-related adverse effects when combined with furosemide.
  • Other blood-pressure medicines or diuretics may intensify blood-pressure reduction, dehydration, or electrolyte disturbances.
  • Digoxin can become more hazardous if furosemide causes low potassium or magnesium levels, increasing the risk of abnormal heart rhythms.

Expected effects include increased urination. Dizziness, light-headedness on standing, low blood pressure, dehydration, and changes in sodium or potassium can also occur. Urgent medical assessment may be needed for fainting, severe weakness, confusion, very low urine output, an irregular heartbeat, marked dehydration, a severe allergic reaction, or new hearing changes. The risk depends on the dose, route, kidney function, other medicines, and speed of fluid loss.

Who Should Seek Medical Advice Before Using Lasix

Certain health circumstances require particular caution, and treatment decisions should be individualized rather than based on a single risk factor:

  • People with a sulfonamide allergy should discuss the reaction history because furosemide is a sulfonamide-derived medicine and cross-sensitivity is possible.
  • Pregnant patients should use furosemide only when the expected benefit justifies the potential fetal risk; it is generally not recommended for pregnancy-induced hypertension.
  • Breastfeeding patients should seek advice because furosemide passes into breast milk and may suppress lactation.
  • People with diabetes may require closer blood-glucose monitoring because furosemide can increase blood glucose or reduce glucose tolerance.
  • People who drive or operate machinery should first determine how the medicine affects them because dizziness, low blood pressure, or blurred vision may impair alertness.

Children may be prescribed oral furosemide, but pediatric dosing is weight-based and subject to specific limits and monitoring. Fixed 40 mg and 100 mg tablets may not be suitable for smaller children who need a lower or more precise dose. Extra assessment is also important for people with severe dehydration, very low blood pressure, major electrolyte abnormalities, difficulty passing urine, gout, liver disease, or impaired kidney function.

Where to Buy Lasix (Furosemide) Tablets in Canada

Customers preparing to buy Lasix (Furosemide) Tablets online can compare our 40 mg and 100 mg strengths and choose among the package quantities we currently offer. We accept Visa, Mastercard, American Express, Bitcoin, and USDT at checkout. Our support team is available 24/7 by email, online chat, or phone, and a pharmacist is available for medicine-related questions.

Before ordering, confirm the prescribed strength, intended quantity, delivery address, and current total shown at checkout. Online ordering changes the purchase channel, not the medicine's effects, monitoring needs, or suitability. Questions about whether Lasix is appropriate, how much to take, or whether it can be combined with another treatment require clinical advice rather than a package or price comparison.

Shipping and Receiving Our Orders Across Canada

Canada's long distances and dispersed communities can affect delivery, especially outside major southern population corridors. We offer Express shipping with tracking and Standard shipping without tracking. The shipping method, current charge, available free-shipping threshold, destination, and estimated delivery window are presented during our checkout, which is the authoritative source for the order.

Our delivery timeframes are estimates rather than guarantees. Rural, northern, and remote destinations may require additional transit, while seasonal conditions can affect transportation anywhere in Canada. Customers should enter a complete address and postal code and select a shipping option that allows enough time before their existing supply runs out.

Furosemide tablets should be stored at 20°C to 25°C, with permitted excursions from 15°C to 30°C, protected from light, and kept in a tightly closed container. Because Canadian winters can bring freezing conditions and some regions experience substantial summer heat, retrieve the parcel promptly from a mailbox or community mail compartment. If a package is damaged or appears to have undergone significant temperature exposure, contact our support team and ask a pharmacist before using the medicine.

Approximate shipping times across Canadian cities - Canada

CityExpressStandard
Edmonton≈ 6 days≈ 20 days
Calgary≈ 5 days≈ 21 days
Sherbrooke≈ 7 days≈ 21 days
Oshawa≈ 4 days≈ 16 days
London (ON)≈ 6 days≈ 16 days
Estimates are based on our experience with previous deliveries and are not guaranteed delivery dates.
Medically reviewed by
Spencer Hughes
Medical pharmacologist
Updated August 14, 2026

Product specifications

Active ingredientFurosemide
Drug classLoop diuretic
Dosage formTablets
Available strengths40 mg, 100 mg
RouteOral
StorageStore at 20°C to 25°C; excursions permitted to 15°C to 30°C. Protect from light and keep the container tightly closed.
ATC codeC03CA01

Regulatory information

Canada: medicine status
Registration statusA Health Canada authorization for the exact Uritol product, including its 40 mg or 100 mg tablet presentation, cannot be confirmed from available official records; verify the Drug Identification Number (DIN), manufacturer, and status in the Drug Product Database before supply.
Prescription statusFurosemide is a prescription drug in Canada and requires a prescription from an authorized prescriber.
Public drug coverageCoverage is not automatic nationally; eligibility and formulary listing for furosemide are determined by federal, provincial, and territorial public drug plans.
Safety monitoringSuspected adverse reactions to furosemide products may be reported to Health Canada through the Canada Vigilance Program.

More information