POM-V Prescription Required Companion Animal

Furosoral 40 mg Tablets for Cats and Dogs

Active ingredient: Furosemide

Form

Tablet

Species

Cats Dogs

Manufacturer

Le Vet Beheer B.V.

VMD MA No.

41821/4021

What it's used for

Treatment of hydrothorax, hydropericardium, ascites and oedema, particularly associated with cardiac insufficiency and renal dysfunction.

Full indications, dosage and side effects ↓

View official SPC (PDF)

The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.

Paying less for Furosemide

1

Ask your vet for a written prescription

They must provide one on request. Under the CMA Order the fee is capped at £21 from 2027.
2

Fill it at a registered online retailer

The CMA found online pharmacies 50–60% cheaper than practice dispensing on common medicines — typically £200–£300 a year.

Your prescription rights → VMD register of retailers →

Prescription required

Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.

Clinical information

Furosoral 40 mg Tablets for Cats and Dogs — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.

Treatment of hydrothorax, hydropericardium, ascites and oedema, particularly
associated with cardiac insufficiency and renal dysfunction.

For oral administration.
The recommended starting dose is 2.5- 5 mg furosemide per kg bodyweight per day,
corresponding to ½ - 1 tablet per 8 kg bodyweight. In severe oedematous or
refractory cases, the daily dose may initially be doubled. For maintenance, daily
dosage should be adapted to the lowest effective dose by the veterinarian depending
on the clinical response of the dog/cat to the therapy.
If treatment is administered last thing at night this may result in inconvenient diuresis
overnight.

Do not use in animals suffering from hypovolaemia, hypotension or dehydration.
Do not use in cases of renal failure with anuria.
Do not use in cases of electrolyte deficiency.
Do not use in cases of known hypersensitivity to furosemide, sulphonamides or any
of the excipients.
Do not use in acute glomerular nephritis.
Do not use in patients that have received excessive doses of cardiac glycosides.
Do not use in combination with other loop diuretics

Revised: May 2024
AN: 02530/2023 & 02731/2023

In rare (more than 1 but less than 10 animals in 10,000 animals tested) cases, soft
faeces may occur. This sign is transient and mild and does not necessitate the
withdrawal of the treatment.
Due to the diuretic action of furosemide, in rare cases there may be
hemoconcentration and impairment of the circulation. In cases of prolonged
treatment electrolyte deficiency (including hypokalemia, hyponatremia) and
dehydration may rarely occur.

Revised: May 2024
AN: 02530/2023 & 02731/2023

Therapeutic efficacy may be impaired by increased intake of drinking water. Where
the animal’s condition permits, water intake should be restricted to physiologically
normal levels during treatment.

Special precautions for use in animals
Furosemide should be used with caution in the case of pre-existing electrolyte and/or
water imbalance, impaired hepatic function (may precipitate hepatic coma) and
diabetes mellitus.
In case of prolonged treatment, hydration status and serum electrolytes should be
monitored frequently.
1-2 days before and after commencement with diuretics and ACE inhibitors renal
function and hydration status should be monitored.
Furosemide should be used with caution in patients with nephrotic syndrome.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals
Furosemide has possible genotoxic properties and there is evidence of
carcinogenicity in mice. Although there is inadequate evidence relating to these
effects in humans, skin contact with or accidental ingestion of the product should be
avoided. Wear impervious gloves during handling and administration of the product
and wash hands thoroughly afterwards.
Each time an unused part-tablet is stored until next use, it should be returned to the
open blister space and inserted back into the cardboard box. The product should be
stored safely, out of the sight and reach of children. In case of accidental ingestion,
seek medical advice immediately and show the package leaflet or the label to the
physician.
People with known hypersensitivity to furosemide and other ingredients in the product
should avoid contact with the veterinary medicinal product. Do not handle this
product if you know you are sensitive to sulphonamides as hypersensitivity to
sulphonamides may lead to hypersensitivity to furosemide. If you develop symptoms
following exposure such as a skin rash, you should seek medical advice and
show the doctor this warning. Swelling of the face, lips or eyes or difficulty with
breathing are more serious symptoms and require urgent medical attention. Wash
hands after use.

In cats, do not use furosemide with ototoxic antibiotics.
Concurrent use with drugs affecting electrolyte balance (corticosteroids, other
diuretics, amphotericin B, cardiac glycosides) requires careful monitoring.
Concomitant use with aminoglycosides or cephalosporins may increase the risk of
nephrotoxicity.
Furosemide may increase the risk of sulfonamide cross-reactivity.
Furosemide may alter insulin requirements in diabetic animals.
Furosemide may reduce the excretion of NSAIDs.
The dose regimen may need to be reduced for long term treatment in combination
with ACE inhibitors, depending upon the animal’s response to therapy.

Not applicable.
5.

This information is sourced from the official Summary of Product Characteristics (SPC) published by the Veterinary Medicines Directorate (VMD). It is provided for informational purposes only and does not replace professional veterinary advice. Always consult your vet before administering any medication.