Lysine Aid Feline Herpes Supplement

SKU: 000305


A healthy cat is a happy cat.



Lysine Aid is an L-Lysine supplement to aid the management of Feline Herpes (FHV-1) in kittens and cats. Lysine administration can help inhibit replication of the Feline Herpes Virus (FHV-1) and can be used to aid management of FHV-1 infection.

Lysine Aid is a very palatable and easily-administered gel specifically formulated by NutriScience for cats.

Feline rhinotracheitis virus (feline herpesvirus type 1 or FHV-1) causes acute respiratory illness known as rhinotracheitis (or feline herpesvirus infection). The virus affects domestic and wild cats worldwide. FHV-1 is the most common world-wide feline viral infection, affecting an estimated fifty per cent of household cats.

L-Lysine, a key component of Lysine Aid, is an amino acid which is naturally present in proteins and can play a important role in the management of herpesvirus infection. It has been shown that during replication of feline herpesvirus, an increase in L-Lysine levels has had inhibiting effects on the virus, as it competes with arginine (another amino acid) in the replication process.

Cats of all ages and breeds are susceptible to feline rhinotracteitis virus, although it is more common in the following situations:

  • Kittens, especially those born to infected mothers
  • Multi-cat households, catteries and pet adoption shelters
  • Overcrowding
  • Physical or psychological stressors
  • Poor nutrition, sanitation ventilation
  • Pregnant cats that are lactating
  • Sick cats
    (especially illness associated with a weakened immune system or other respiratory infection)
  • Unvaccinated cats

Managing and containing the virus

Vaccinations are available for these viruses, and although not 100% effective in preventing disease, the vaccine can reduce the severity of the “flu” and make it less likely to be transmitted to other cats. Antibiotics are used to prevent secondary bacterial infections. Some veterinarians have found success with Interferon, which helps to boost the immune system. Positive results have also been found with the administration of L-Lysine in a dosage of 250-500 mg twice a day. It has also been shown that L-Lysine supplementation in cats limits the intensity of both virus shedding and clinical signs of herpes virus infection.

The following precautions are well worth the effort:

  • Reduce risk factors e.g. avoid over population
  • Ensure good hygienic practises are followed in the cattery
  • Isolate newborn kittens until vaccination is effective
  • Institute a regular vaccination programme

Special attention should be paid to nutrition with URI-infected cats. Because of nasal stuffiness, they may not be able to smell their food, and refuse to eat. Sometimes warming the food will increase the odour and entice the cat to eat.
Dehydration can be a real problem, so moist foods may be best for the cat under treatment, as well as water given by eye-dropper, if necessary.


Lysine Aid Feline Herpes Supplement
is recommended for cats who suffer from:

  • Sneezing “attacks”
  • Discharge from the nose and eyes
  • Conjunctivitis or pink eye (inflammation of the eyelid)
  • Lesions in and around the eyes
  • Eye ulcers
  • Congestion
  • Fever
  • Depression
  • Loss of appetite
  • Drooling
  • Squinting
  • Lethargy
Cats weakened by the virus may also develop secondary infections.

Nutritional Info

Contents Amount %
Crude Carbohydrate 34.2%
Crude Protein 20.2%
Crude Oils & Fats 0.1%
Crude Fibre <0.5%
Crude Ash 0.6%
Moisture 44.9%
Calorific Value (Kcal/100 g) 219 kcal

How and when to use

Lysine Aid should be given during stressful periods. Use Lysine Aid as soon as possible for best results. Ideally Lysine Aid should be given for one week before periods of stress and for at least 2 weeks afterwards.

Type Amount
Cats: 2 ml twice daily
Kittens: 1 ml twice daily

Usage Notes: Apply to cat’s paw or add to food. 1 Pump = 2ml.

Packs & Sizes

Product Name Size Included Measuring Device
Lysine Aid Feline Herpes Supplement Salmon flavoured gel (50 ml) oral measurements