Lasix (Furosemide)

Name: Lasix
Brand: Sanofi Aventis
SKU: 2353
Availability: InStock

Type

Product

Manufacturer

Country

Dosage

Qty-Price (USD)

Type:

Product: Lasix Oral Solution

Manufacturer: Sanofi Aventis

Country: Canada

Dosage: 10 mg/ml/120 ml

Qty-Price (USD):

Type:

Product: Lasix

Manufacturer: Brand

Country: Turkey

Dosage: 40 mg

Qty-Price (USD):

Type:

Product: Lasix

Manufacturer: Aventis

Country: India

Dosage: 40 mg

Qty-Price (USD):

Type:

Product: Lasix

Manufacturer: Sanofi Aventis

Country: Canada

Dosage: 500 mg

Qty-Price (USD):

Generic Equivalent of Lasix

Type

Product

Manufacturer

Country

Dosage

Qty-Price (USD)

Type:

Product: Furosemide

Manufacturer: Generic

Country: Canada

Dosage: 20 mg

Qty-Price (USD):

Type:

Product: Furosemide

Manufacturer: Generic

Country: Canada

Dosage: 40 mg

Qty-Price (USD):

Type:

Product: Furosemide

Manufacturer: Generic

Country: Canada

Dosage: 80 mg

Qty-Price (USD):

Lasix Information

medically reviewed by Dr. HaVy Ngo, Pharmacist on August 13, 2025.

Lasix and Furosemide at CanadaPharmacyOnline.com

Sanofi (formerly Sanofi-Aventis) manufactures and markets the brand-name diuretic Lasix (furosemide) in numerous countries worldwide, including Canada, India, and Turkey.

Generic furosemide is sourced from manufacturers that meet applicable regulatory standards. The specific manufacturer of your dispensed medication may vary.

Important Information about Generic Lasix:

Generic furosemide contains the same active ingredient as the brand-name Lasix and is required to meet the same safety, effectiveness, and quality standards as the brand-name product. This means it's designed to work in the same way as furosemide, also known as Lasix. Studies have demonstrated bioequivalence between generic and brand-name furosemide, meaning they have comparable absorption rates and overall effects. However, individual responses to any medication can vary.

If you have any questions about using generic furosemide, talk to your doctor or pharmacist. For more information about generic drug approval and bioequivalence, please visit Access to Generic Drugs in Canada | Canada.ca.

Dosage

Lasix (furosemide) and its generic forms are commonly available as:
• Oral Tablets: 20 mg, 40 mg, and 80 mg strengths.
• High-Dose Oral Tablets: 500 mg (often found in Canada and certain other regions, typically for patients with severe kidney impairment).
• Oral Solution: 10 mg/mL (often supplied in 120 mL bottles).

Your doctor will determine the appropriate dose based on your individual needs and medical history.

Usage

Lasix (furosemide) is a prescription medication used to treat conditions associated with fluid retention (edema) and hypertension, including:
• Edema associated with Congestive Heart Failure (CHF): To reduce fluid accumulation in the body, particularly in the lungs and extremities.
• Edema associated with Hepatic Cirrhosis (liver disease): To manage fluid retention due to liver dysfunction, it is often used with potassium-sparing diuretics.
• Edema associated with Renal Disease (kidney disease): To remove excess fluid in patients with impaired kidney function, including nephrotic syndrome.
• Hypertension (high blood pressure): Used alone or in combination with other antihypertensive agents to lower blood pressure, especially in patients with fluid retention or impaired renal function.
• Pulmonary edema (fluid in the lungs): For rapid removal of fluid from the lungs in acute situations.

Mechanism of Action
Lasix (furosemide) is a potent loop diuretic. It primarily acts on the ascending limb of the loop of Henle in the kidneys, where it inhibits the reabsorption of sodium and chloride ions. This inhibition occurs by blocking the Na+-K+-2Cl- cotransporter system. By preventing the reabsorption of these ions, furosemide leads to a significant increase in the excretion of water, sodium, chloride, potassium, hydrogen, calcium, and magnesium. This results in increased urine output, which helps to reduce fluid overload, lower blood pressure, and alleviate edema. Its rapid onset and short duration of action make it particularly useful in acute clinical situations.

Take Lasix exactly as your doctor prescribes, following the instructions in the product monograph in Canada. Consult your doctor for personalized guidance and safe use.

The information below summarizes some, but not all, potential side effects, risks, and interactions. Before taking Lasix, it is essential to discuss all possible side effects, risks, and interactions with your doctor or pharmacist.

Side Effects

The information below is a partial list of side effects; individual reactions can vary. Before starting Lasix, it is crucial to discuss potential side effects and risks with your doctor or pharmacist.

Common Side Effects - The following are some common side effects of Lasix; other side effects may also occur. Contact your doctor promptly if any side effects are persistent, worsening, or concerning, or if you experience any other concerning symptoms.
• Dizziness
• Electrolyte imbalances (e.g., low potassium, low sodium, low magnesium, low calcium)
• Increased urination
• Lightheadedness
• Muscle cramps or weakness
• Nausea
• Orthostatic hypotension (dizziness upon standing)
• Upset stomach

Serious Side Effects - These are rare but potentially severe side effects. Seek immediate medical attention or call emergency services if you experience any of the following:
• Allergic reactions: Severe rash, hives, swelling of the face, lips, tongue, or throat, difficulty breathing, wheezing, and itching.
• Blood disorders: Agranulocytosis (severe drop in white blood cells), aplastic anemia (failure of bone marrow to produce blood cells), thrombocytopenia (low platelet count), hemolytic anemia (destruction of red blood cells).
• Dehydration: Excessive fluid loss, leading to symptoms such as extreme thirst, dry mouth, reduced urination, or confusion.
• Hearing impairment or Tinnitus (ringing in the ears): Especially with high doses, rapid intravenous administration, or in patients with impaired renal function or those taking other ototoxic drugs. This can be transient or permanent.
• Hepatic encephalopathy: In patients with liver cirrhosis and associated electrolyte imbalance. Symptoms include confusion, disorientation, or coma.
• Kidney problems: Worsening of kidney function, or acute kidney injury, particularly in patients with pre-existing kidney disease.
• Pancreatitis: Severe abdominal pain, nausea, vomiting.
• Skin reactions: Severe skin reactions such as Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), or exfoliative dermatitis.
• Uric acid increase/Gout: May elevate uric acid levels, potentially triggering gout attacks.

Contraindications

The following is not an exhaustive list of contraindications. Before starting Lasix, it is crucial to discuss all your medical conditions, past and present, and all medications you are taking with your doctor or pharmacist.

Lasix should not be used if:
• You are allergic to furosemide, sulfonamides, or any other ingredient in Lasix.
• You have anuria (inability to produce urine).
• You have hepatic coma or pre-coma (severe liver impairment with brain dysfunction).
• You have severe electrolyte depletion that cannot be corrected.

Tell your doctor about all of your medical conditions, past and present, before starting Lasix. This is crucial because certain conditions affect whether Lasix is right for you. These conditions may include, but are not limited to:
• Anuria (inability to urinate)
• Diabetes mellitus (may affect blood sugar control)
• Gout or high uric acid levels
• Hearing impairment or a history of hearing problems
• History of allergy to sulfonamide medications (e.g., some antibiotics)
• Kidney disease or impaired kidney function
• Liver disease or impaired liver function, especially cirrhosis
• Pancreatitis
• Prostate enlargement or other urinary tract obstruction
• Systemic lupus erythematosus (SLE)

Drug Interactions

Before taking Lasix, it is essential to discuss all potential risks and interactions with your doctor or pharmacist. For complete and up-to-date information, please visit the Lasix prescribing information | Sanofi-Aventis.

Provide your doctor with a complete list of all your medications, including prescriptions, over-the-counter (OTC) drugs, vitamins, and herbal supplements. It is also essential to inform your doctor about any herbal teas, recreational drugs, or significant dietary changes you are making, as these could potentially interact with Lasix. Lasix may interact with other medicines, but is not limited to:
• Aminoglycoside antibiotics (e.g., gentamicin, tobramycin): Increased risk of ototoxicity (hearing damage) and nephrotoxicity (kidney damage). Avoid concomitant use if possible.
• Antihypertensive agents (e.g., ACE inhibitors, ARBs, beta-blockers): Increased risk of hypotension (low blood pressure) when combined with other blood pressure-lowering drugs.
• Aspirin and other NSAIDs (non-steroidal anti-inflammatory drugs) (e.g., ibuprofen, naproxen): May reduce the diuretic and antihypertensive effects of furosemide and increase the risk of kidney problems.
• Cephalosporins (some, especially in high doses with impaired renal function): Increased risk of nephrotoxicity.
• Cisplatin (chemotherapy drug): Increased risk of ototoxicity and nephrotoxicity.
• Digitalis glycosides (e.g., digoxin): Increased risk of digitalis toxicity due to furosemide-induced hypokalemia (low potassium).
• Lithium: Furosemide can reduce lithium excretion, leading to increased lithium levels and potential toxicity. Close monitoring of lithium levels is essential.
• Muscle relaxants (non-depolarizing): Furosemide may potentiate the effect of these medications.
• Phenytoin: May reduce the diuretic effect of furosemide.
• Sucralfate: May reduce the diuretic effect of furosemide. Administer sucralfate at least 2 hours before or after furosemide.
• Thiazide diuretics (e.g., hydrochlorothiazide): Can produce a synergistic diuretic effect, potentially leading to profound diuresis and electrolyte imbalance.

Pregnancy and Breastfeeding

Lasix should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. Furosemide crosses the placental barrier. While there are no adequate and well-controlled studies in pregnant women, animal studies have shown some adverse effects. Due to its potent diuretic action and the potential for electrolyte disturbances, close monitoring of both mother and fetus is essential if used during pregnancy. Furosemide is excreted in human milk. Due to the potential for severe adverse reactions in nursing infants and the potential for suppressing lactation, a decision should be made whether to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother. Consult your doctor for personalized advice.

Use in the Elderly

Elderly patients may be more susceptible to the effects of Lasix, particularly regarding fluid and electrolyte imbalances and orthostatic hypotension. Close monitoring of fluid status, electrolytes, and renal function is recommended. Lower initial doses and gradual titration may be necessary.

Use in Children

Lasix is used in pediatric patients for the treatment of edema associated with congestive heart failure, renal disease, and hepatic disease. The dosage in pediatric patients must be individualized based on body weight and response. Close monitoring for fluid and electrolyte imbalances is critical in this population.

Frequently Asked Questions about Lasix at Canada Pharmacy Online:

Why is Lasix more affordable in Canada than in the United States?

Prescription drug prices, including Lasix, are generally lower in Canada than in the US due to a combination of factors, primarily government price regulations, differing market dynamics, and other economic considerations. In Canada, provincial and federal governments negotiate drug prices with pharmaceutical companies, which often results in lower costs compared to the US, where market forces play a more significant role. For more information, see the FAQs on Prescription Drug Importation from the Kaiser Family Foundation (KFF): https://www.kff.org/health-costs/issue-brief/faqs-on-prescription-drug-importation/

How much is the shipping?

Our shipping fee is a flat rate of $10.00 per order. Our pharmacy is dedicated to offering you the lowest prices on high-quality products.

How do I place an order with your pharmacy?

Ordering from us is very simple. You can purchase online or call Customer Service at 1866.920.3784; for more information or to learn about the ordering process, visit our How to Order page.

Is there a limit on the number of tablets I can order at one time?

CanadaPharmacyOnline.com can only dispense a maximum of a three-month supply of Lasix at a time, as per your doctor's prescription.

Can I buy over the counter from you?

No, Lasix requires a valid prescription from your doctor. We do not sell this product without a valid prescription.

Do you ship to the United States?

Yes, we do. It usually takes 7 to 18 business days to receive your order from our pharmacy.

What is the best time to take Lasix?

Lasix is usually taken once or twice daily, typically in the morning or early afternoon to avoid nighttime urination. It can be taken with or without food. If you are taking it once daily, take it in the morning. If you are taking it twice daily, take the second dose in the early afternoon. Always follow your doctor's specific instructions.

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The information on this page is sourced from independent third parties contracted by CanadaPharmacyOnline. While we cannot guarantee its medical accuracy, we strongly recommend consulting a healthcare professional for personalized advice regarding medications or medical conditions.

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