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Isathal is used for the treatment of conjunctivitis in cats, dogs and rabbits.


2KD France




Cat, Dog, Rabbit

Prescription Type

POM-V (Written prescription required)

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Reference : MED-00027
Delivery Between 2 and 3 days
  • Description
  • Properties
  • Packaging
  • Ingredients
  • Directions
  • Legal notice
  • Customer Reviews
  • Further advice

What is Isathal?


Isathal (formerly known as Fucithalmic) is a sterile, viscous suspension for ocular use, for the treatment of otitis externa including the ear mite (Otodectes cynotis) infestation in cats and dogs.


Who is it for?


Dogs: For the topical treatment of conjunctivitis associated with Staphylococcus aureus and in particular the biotype Staphylococcus intermedius.

Cats: For the topical treatment of conjunctivitis associated with secondary staphylococcal infections.

Rabbits: For the topical treatment of conjunctivitis associated with staphylococcal infections.


This is a Prescription only medicine (POM-V).

Isathal is only available with a prescription from your veterinary surgeon.

To check the most up to date information about this product, please read its Summary of Product Characteristics (SPC). It can be viewed here.

What is the active ingredient in Isathal?


Fusidic acid is active against Staphylococcus aureus and in particular against the biotype Staphylococcus intermedius which is a common isolate from clinical cases of canine conjunctivitis.

In the cat, ocular bacterial infection is usually secondary to viral, Chlamydia or Mycoplasmal infection or trauma. Among the variety of bacteria found, the Staphylococcus spp. are considered to be sensitive to fusidic acid.

In the rabbit, ocular infections are associated with a variety of organisms which are sensitive to fusidic acid, the most common of which are Staphylococci.

The sustained release formulation of the veterinary medicinal product ensures prolonged retention within the conjunctival sac. Once or twice daily applications will provide inhibitory levels of fusidic acid against the sensitive organisms.

Studies have shown that fusidic acid penetrates well into the cornea and anterior chamber in humans and rabbits.

3g tube

What is in Isathal?


1g suspension contains: 

Active substances:

Fusidic acid 10 mg



Benzalkonium chloride (as antimicrobial preservative) 0.11 mg

Disodium edetate (as co-preservative) 0.5 mg

How do I use Isathal?


Isathal is a prescription product and must be used according to the instructions of your veterinary surgeon.

Please read the product leaflet thoroughly before administering to your pet.

Marketing Authorisation Holder

Dechra Limited
Snaygill Industrial Estate
Keighley Road
North Yorkshire
BD23 2RW

Marketing Authorisation Number

Vm 24883/4003

Is there any further advice I should know about Isathal?




The veterinary medicinal product should not be used in conjunctivitis cases associated with Pseudomonas spp.

Do not use in cases of known hypersensitivity to the active substance or any of the excipients.


Special warnings for each target species


In cats, the possibility of a primary cause of the conjunctivitis should be investigated and treated if possible.

In rabbits, conjunctivitis may be associated with dacryocystitis and/or dental disease. In such cases, appropriate additional treatment should be instituted.


Special warnings


For external use only.

To be used under veterinary supervision.


Special precautions for use


Official, national and regional antimicrobial polices should be taken into account when the product is used.


Special precautions for use in animals


For external use only.

When the tube is squeezed, the veterinary medicinal product comes out as a thick (viscous) drop. The drop quickly becomes liquid on contact with tear fluid and does not affect the sight.

Care should be taken to avoid contamination of the contents during use and to avoid the nozzle coming into direct contact with the eye. Avoid fingers touching the tube nozzle.

Do not use the same tube to treat different animals.


Special precautions to be taken by the person administering the product to animals


Wash hands after applying the product.


Adverse reactions


Allergic reactions or hypersensitivity to the active substance or the excipients might occur. Discontinue use if hypersensitivity to the product develops.


Use during pregnancy and lactation


The product may be used safely in pregnant and lactating animals.