Salix (Lasix, Furosemide)
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At a Glance
Treats congestive heart failure along with certain liver & kidney diseases
Treats fluid retention and swelling
Easy dosages

Salix (Lasix, Furosemide)

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At a Glance
Treats congestive heart failure along with certain liver & kidney diseases
Treats fluid retention and swelling
Easy dosages

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Merck Animal Health Logo

Salix, also known as Furosemide is a diuretic, which means it expels retained fluids. It is commonly used for dogs and cats suffering from congestive heart failure, liver disease, certain kidney disease and can also be part of a treatment in animals with high blood pressure.

An effective and affordable generic to Salix is Furosemide.

It is important to take a few precautions before administering Salix to the pet. Avoid Salix if the pet is allergic to it or other sulfonamides. As the drug is a potent diuretic-saluretic, large amounts of the drug would cause dehydration and electrolyte imbalance. Therefore, never prescribe the drug to animals with electrolyte imbalance. Use with extreme caution in animals suffering from diabetes and kidney disease. Salix can interact with ototoxic antibiotics such as gentamicin or streptomycin; NSAIDS such as aspirin or Rimadyl; phenothiazines such as acepromazine; and Insulin, digoxin, and beta blockers such as propranolol. Therefore, do not administer the Salix in combination with these drugs. Check the potassium levels in pets before administering the medicine. Salix could reduce serum calcium levels and might be responsible for tetany in animals that have hypocalcemic tendency.

The recommended dose of Salix in dogs and cats is 1-2mg/pound once or twice a day (at 6-8 hour intervals). Cats are generally given a lower dose of the medicine. Higher doses are often administered based on the severity of the symptoms.

  • Merck Animal Health Brand
  • Kidney Health Pharmacy
  • Heart & Blood Pressure Pharmacy
  • Asthma & Respiratory Pharmacy
  • Care Wellness Philosophy
  • Kidney Disease Kidney Health
  • Heart Failure Heart & Blood Pressure Health
  • Ivermectin Sensitivity Allergies
  • Prescription Pharmacy Type
  • Merck Animal Health Manufacturer
  • Oral Application
  • Cat Pet Type
  • Dog Pet Type

What Are the Side Effects of Furosemide in Dogs?

Furosemide for dogs side effects includes increased production of urine, diarrhea, and constipation. There are also a few serious side effects that include head tilt, losing balance, weakness, collapse, electrolyte imbalance, increased heart rate, and low production of urine. Salix (furosemide) for dogs which is a brand-name drug for Furosemide, can reduce plasma volume, which might increase the risk of circulatory collapse. Hence, if you notice these or any other side effects while administering the Furosemide or Salix dosage for dogs, get in touch with a vet immediately. You will need a prescription from a vet to buy the Furosemide or Salix tablets for dogs.

What Is the Difference Between Salix and Furosemide?

Both Furosemide and the Salix medication serve similar purposes, but there is one key difference between them. Furosemide is a generic variant of the medication or drug, whereas Salix is a brand-name drug. Both Furosemide and a Salix pill will contain the same active ingredient. The two drugs might vary in shape or color. Brand-name drugs are most of the time more expensive than generic ones. However, that does not mean that there is a difference in the effectiveness of generic and brand drugs. They are equally effective, and you can substitute one for the other, given that your vet or doctor allows you to.

What Is Lasix Furosemide Used For?

Lasix Furosemide is used to reduce extra body fluid (edema) that is caused by health problems like heart failure, kidney disease, or liver disease. Lasix is also used on patients that who have high blood pressure. This allows the body to regulate its internal blood pressure, and prevent health conditions related to the kidney, and heart, like strokes, heart attacks, or kidney failure. Salix, Lasix, and Disal are brand-name drugs of Furosemide. Furosemide itself is a diuretic, which means it can lead to increased production of urine. And it is through the urine that your body can let go of the excess water and salt. Otherwise, this excess water and salt can lead to a lot of heart and kidney problems.

What Is the Difference Between Lasix and Furosemide?

The main difference between Lasix and Furosemide is that Lasix is a brand-name drug and Furosemide is the generic version. Besides this, no other difference can be seen between the two. Lasix and Furosemide have the same active ingredient. Both Lasix and Furosemide are diuretics. That means they lead to an increase in urine production. Through this increased urine production, the drugs allow excess water and salt to leave the body. And by doing so, diuretics can keep the heart and kidney stable, and prevent any sort of fatal heart or kidney conditions.

How Long Does It Take for Furosemide to Reduce Swelling?

Furosemide will take anything from 1 to 6 hours to reduce swelling. After an hour of taking the drug, your dog will feel like having a pee. This urge to urinate will continue for up to six hours or a bit longer. Furosemide is a diuretic that leads to increased production of urine. And through urinating, the body lets go of the excess amounts of salt and water in the body. Swelling and edema are mostly caused due to kidney or heart failures. Furosemide deals with the swelling and edema by forcing the body to expel the excess salt and water.

Is Lasix Hard on the Kidneys?

Lasix will not be hard on the kidneys as long as your dog is drinking plenty of water. Since it is a diuretic, it creates an urge in your dogs to go and urinate more frequently. However, to make sure it does not put excess pressure on the kidneys, you will have to increase the water intake of your dog.

How long can a dog live with congestive heart failure?

Dogs diagnosed with congestive heart failure (CHF) typically have a prognosis ranging from a few months to around 1 1/2 to 2 years, although individual cases can vary. CHF is a progressive condition, and while treatment can help manage the symptoms and slow down the disease progression, it is generally not curable. The specific lifespan of a dog with CHF depends on various factors, including the underlying cause of the condition, the stage at which it is diagnosed, the dog's overall health, the effectiveness of treatment, and the individual response to therapy. Some dogs may respond well to medications and lifestyle adjustments, allowing them to live closer to the longer end of the estimated range, while others may experience a more rapid decline. Regular veterinary care, close monitoring of the dog's condition, and adherence to the prescribed treatment plan are crucial for optimizing the dog's lifespan and quality of life.

What are the signs of congestive heart failure in a dog?

Congestive heart failure (CHF) in dogs can present with several signs and symptoms. These can include persistent coughing, difficulty breathing or rapid/labored breathing, reduced exercise tolerance, fatigue, and weakness, decreased appetite, and weight loss, abdominal distension, fainting or collapsing in severe cases, and a bluish or grayish tint to the gums or tongue due to inadequate oxygenation.

Is congestive heart failure in dogs sudden?

Congestive heart failure (CHF) in dogs is typically not a sudden condition. It is a progressive disease that develops over time. While the underlying heart disease may have been present for some time, the onset of congestive heart failure usually occurs gradually. The progression of CHF can vary depending on factors such as the underlying cause, the dog's overall health, and the effectiveness of treatment. Initially, dogs may show subtle signs such as occasional coughing or exercise intolerance. As the disease advances, the symptoms become more pronounced and may include persistent coughing, difficulty breathing, fatigue, and other signs mentioned earlier. There can be acute exacerbations or episodes of sudden worsening in a dog with CHF. These can occur due to factors such as a rapid increase in fluid buildup in the lungs or a sudden heart rhythm abnormality. These episodes may require immediate veterinary intervention. Regular veterinary check-ups, monitoring of symptoms, and prompt treatment adjustment can help manage CHF and minimize the risk of sudden exacerbations.

What are the 4 stages of congestive heart failure in dogs?

Congestive heart failure (CHF) in dogs is commonly classified into four stages based on the severity and progression of the condition. In the first stage, dogs typically do not show clinical signs of heart failure. However, they may have underlying heart disease or structural abnormalities that make them more susceptible to developing CHF in the future. Dogs in stage II may display mild clinical signs of heart failure, such as exercise intolerance, increased respiratory rate, or coughing, especially during physical activity. These signs become more evident with exertion. Dogs in stage III of CHF exhibit moderate clinical signs of heart failure. They may experience coughing, difficulty breathing, and exercise intolerance even with minimal activity. Resting respiratory rate may also be elevated, and there may be a decrease in appetite and weight loss. Stage IV is the most severe stage of CHF. Dogs in stage IV experience severe clinical signs of heart failure, including persistent coughing, extreme difficulty breathing even at rest, significant exercise intolerance, lethargy, and weakness. They may also have fluid accumulation in the abdomen (ascites) or in the limbs (edema). While these stages provide a general framework for understanding CHF progression, individual cases can vary. The specific symptoms and progression can depend on factors such as the underlying cause of CHF and the effectiveness of treatment.

How do you get rid of fluid retention in dogs?

The specific treatment approach will depend on the cause of the edema and the dog's overall health condition. Diuretic medications are commonly prescribed to increase urine production and promote the elimination of excess fluid from the body. The specific diuretic and dosage will be determined by a veterinarian based on the dog's condition. In some cases, modifying the dog's diet can help manage fluid retention. A low-sodium diet may be recommended to reduce fluid buildup. It's essential to consult with a veterinarian for dietary recommendations specific to your dog's needs. Treating the underlying condition that is causing fluid retention can help alleviate the symptoms. For example, if congestive heart failure (CHF) is the cause, medications to manage heart function and fluid balance may be prescribed. Noncardiogenic pulmonary edema refers to fluid accumulation in the lungs that is not caused by congestive heart failure. Treatment for dogs suffering from noncardiogenic pulmonary edema typically involves a combination of antibiotics, intravenous fluids, colloids, diuretics, and anti-inflammatories. Antibiotics are prescribed if an underlying infection is present. Intravenous fluids and colloids help maintain hydration and fluid balance. Diuretics aid in eliminating excess fluid from the body. Anti-inflammatories, such as corticosteroids, reduce lung inflammation. Additionally, oxygen therapy may be provided to improve oxygenation and alleviate respiratory distress.


Salix is a diuretic mainly used in the treatment of congestive heart failure, pulmonary edema, kidney disease, high blood pressure and edema. The drug helps to drain excessive fluids from the body. Oral diuretic tablet plays an important role in the treatment of conditions where removal of abnormally retained fluid is required.

IMPORTANT SAFETY INFORMATION: SALIXยฎ is a highly effective diuretic and if given in excessive amounts as with any diuretic may lead to excessive diuresis which could result in electrolyte imbalance, dehydration and reduction of plasma volume enhancing the risk of circulatory collapse, thrombosis, and embolism. Therefore, the animal should be observed for early signs of fluid depletion with electrolyte imbalance, and corrective measures administered. Excessive loss of potassium in patients receiving digitalis or its glycosides may precipitate digitalis toxicity. Caution should be exercised in animals administered potassium-depleting steroids. It is important to correct potassium deficiency with dietary supplementation. Caution should be exercised in prescribing enteric-coated potassium tablets. Consult your veterinarian and see product label for full information regarding contraindications, warnings, and precautions.

Salix might give rise to certain side effects such as nausea, vomiting, weakness, loss of appetite, increased urination, electrolyte imbalance, diabetes, itching, and rash. Pet owners having hypersensitivities to sulfa drugs should be extremely cautious while handling Salix. Wear gloves as there are possible chances of allergic reactions to the medicine.

  • Salix is available by prescription only. Follow directions given by your veterinarian.

  • The usual dose for dogs is 1-2mg per pound of body weight given in 6 to 8 hour intervals.

  • Cats usually receive doses of 1mg per pound of body weight once a day.

  • Make sure your animal has plenty of fresh water available, this medication will increase the amount your cat or dog urinates.
  • Ask your veterinarian or consult with one of our pet care specialists at 1-800-844-1427.

    This information is for informational purposes only and is not meant as a substitute for the professional advice of, or diagnosis or treatment by, your veterinarian. Always seek the advice of your veterinarian or other qualified professional with any questions you may have regarding a medical condition. Never disregard or delay seeking professional advice due to what you may have read on our website. Our medications are FDA approved and/or EPA regulated when and as required by law.

    Salix (Lasix, Furosemide) is manufactured by Merck Animal Health

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