Furosemide for dogs and cats

cat and dog, friends

Diuretic medicine is used to increase urine flow and reduce swelling caused by salt and water retention in case of the complications of heart, kidney, liver or lung disease.

Diuretics are pharmacological drugs that increase urine output by the kidney. They increase production of urine removing salt and excess water from the body. There are several types of diuretics with the different mechanism of action.

Loop diuretics prevent the reabsorption of sodium and chlorine in the loop of Henle. The leading representative of the pharmacological class is Lasix with the active ingredient Furosemide.

Lasix has a pronounced diuretic, natriuretic, and kaliuretic effects. Additionally, it promotes the excretion of calcium, potassium, magnesium ions. Furosemide starts working within 30-60 minutes after administration. The duration of action is usually 2-3 hours (depending on the kidneys condition, it can be up to 8 hours).

Veterinarians and cardiologists often prescribe loop diuretics to treat dogs and cats with congestive heart failure.

Heart failure in dogs means that the heart of the animal fails to pump th sufficient volume of blood. Changes develop gradually and depend on many factors. Doctors distinguish acute and chronic forms of the disease. Treatment includes intensive therapy with the use of diuretics; in many cases, a doctor prescribes loop diuretics.

Furosemide for cats is usually prescribed for urinary problems. Castrated cats suffer from urine retention particularly often. It also s symptom of the inflammatory process in the body. It often caused by urethra inflammation caused by hypothermia or malnutrition. It is always recommended to consult a doctor before starting diuretics for a cat or a dog.

If there are severe kidney problems or inflammation, urine retention Acute urinary retention can cause significant discomfort or pain and even lead to intoxication. However, it is not recommended to use diuretics for cats for preventive purposes because it will damage kidneys. You need to consult a doctor before starting your cat on any diuretics.

Contraindications: Don’t take Lasix in the case of acute glomerulonephritis, acute renal failure with anuria, water-salt metabolism disorders, pre-coma, hepatic coma, diabetic coma, and hypersensitivity to furosemide.

Treatment with furosemide is recommended to combine with a diet rich in potassium. The dosage is defined individually and depends on the indications and the clinical situation. In the process of treatment, the dosage can be corrected. Furosemide is usually taken orally by mouth in the morning before meals. It is inappropriate to use furosemide with cephalosporin, gentamicin and other drugs that have nephritic and ototoxic effects.

Lasix increases the concentration of levomycetin, aminoglycosides, and cephalosporin. Non-steroidal anti-inflammatory drugs decrease furosemide action.

Common side effects are possible in case of extended use as well as high dosage treatment and include hypervolemia, dehydration, hypokalemia, hypochloraemia. Nausea is also possible as well as vomiting, thirst, muscle weakness, diarrhea, dermatitis and allergic reactions.

Quite often Lasix is used for edema caused by burns, cardiac asthma, arterial hypertension, etc.


Everybody knows that old dogs get a whole “bouquet” of diseases, including renal failure. My poor dog was in pain and very thirsty. He was passive, weak, without appetite. He also got a scary swollen belly. I took him to a vet. After tests, the veterinarian prescribed a strict diet and a set of drugs, including Lasix in a dosage of 20 mg twice a day to reduce edema. There were two choices: injections or pills. Since no one could make injections, we decided to buy Lasix in tablets. After the treatment, the dog asked for a walk to urinate and his belly began to go back to normal. In my opinion, the main advantage of the drug is its immediate action! The edema went away literally in few hours. Also, the medicine is very affordable by today’s standards.