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Felisyl Immune System Support Gel

This page contains information on Felisyl Immune System Support Gel for veterinary use.
The information provided typically includes the following:
  • Felisyl Immune System Support Gel Indications
  • Warnings and cautions for Felisyl Immune System Support Gel
  • Direction and dosage information for Felisyl Immune System Support Gel

Felisyl Immune System Support Gel

This treatment applies to the following species:
Company: PHS

Felisyl® is a gel supplement that contains the amino acid L-Lysine for use in cats and kittens for conditions responsive to L-Lysine. L-Lysine is an essential amino acid, which means that your cat’s body needs it, but can’t produce it, so this supplement is a perfect choice to provide that necessity.

L-Lysine HCL Immune System Support for Cats gel helps keep your cat healthy by supporting the immune system naturally so that it can function normally and produce antibodies. Felisyl L-Lysine Gel for Cats also helps maintain healthy tissue, supports respiratory health, and may even help with your cat’s vision. The L-Lysine is in a maple flavored gel that your cat will enjoy eating, making it easy to administer on food or right on the cat’s paw.

Product Facts

Guaranteed Analysis per (1/4 tsp):

(All values are minimum quantities unless otherwise stated.)

Moisture (max)



250 mg

Ingredients: Artificial Sweetener*, Citric Acid, Maple Flavor, Purified Water, Potassium Sorbate, Riboflavin 5’ - Phosphate Sodium, Sodium Benzoate, and Sodium Carboxymethylcellulose.

*Proprietary sweetener does not contain xylitol, approved for use in supplements for pets.

For Use In:


Feeding Directions:

Place measured amount into cat’s mouth or on food. This product is intended for intermittent or supplemental feeding only.


Age of Cat



Under 6 months

1/8 tsp

1/8 tsp

Over 6 months

1/4 tsp

1/4 tsp

Keep container at room temperature (59°F-86°F).

For animal use only. Keep out of the reach of children and animals. In case of accidental overdose, contact a health professional immediately.

Product Website:

5 oz (120 Doses)


CPN: 6210061.0

34501 7TH ST., UNION CITY, CA, 94587
Toll-Free:   877-564-6862
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