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Enisyl-F for Cats

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Products 1-4 of 4
Enisyl-F (L-Lysine) Nutritional Supplement for Cats, 100 mL
Price: $38.33
Item #: 1016448 -
Availability: In Stock
Enisyl-F (L-Lysine) Nutritional Supplement for Cats, 100 mL - 3 Pack
Price: $91.05
Item #: 1016449 -
Availability: In Stock
Enisyl-F (L-Lysine) Nutritional Supplement for Cats, 100 mL - 6 Pack
Price: $170.12
Item #: 1016621 -
Availability: In Stock
Enisyl-F Lysine Treats, 180 gm
Price: $27.83
Item #: 1016717 -
Availability: In Stock

Products 1-4 of 4

Feline Herpes L-Lysine Supplement

Enisyl-F is a pet medication for the treatment of Feline Herpes Virus (FHV) that contains l-lysine. Enisyl-F uses amino acids to compete with arginine which diminishes the virus’ ability to multiply. Enisyl-F Treats and Oral Gel are available at discount prices and are easy and convenient to administer.

Comparable Trade Names & Generics

Enisyl-F is a nutritional supplement used to treat feline herpes virus (FHV-1). It can reduce the severity, frequency, and duration of herpes outbreaks in your cat. Administer Enisyl-F to your cat as a treat or as a highly palatable oral paste. This product may also be recommended by your veterinarian for use in cats with other conditions responsive to L-lysine supplementation.

Benefits of Enisyl-F:

  • Cuts down on the number of herpes flare-ups in your cat
  • Reduces the severity of outbreaks
  • Helps bring flare-ups under control more quickly
  • Particularly effective at treating respiratory and ocular symptoms of feline herpes virus
  • Available as treats or paste with a taste cats love for ease of administration
  • Used for routine care and outbreak treatment
  • Does not require a prescription from a veterinarian
  • A nutritional supplement, rather than a medication, that is not associated with side effects

Enisyl-F is for cats with the feline herpes virus (FHV-1). Do not administer treats or paste to other animals. Not for use in humans.

Do not allow children to handle or administer Enisyl-F.

Review all manufacturer directions and warnings prior to use.

Doses vary; talk to your veterinarian about how best to use Enisyl-F in your cat. It is recommended that your veterinarian perform an examination before beginning the regimen.

Enisyl-F Treats Directions:

  • Hand-feed 5 treats per day, for a daily total of 250 mg L-lysine, to your cat for routine control of feline herpes virus.
  • Increase the daily dosage to 10 treats, for a total of 500 mg L-lysine, during a herpes flare-up.

Enisyl-F Oral Paste Directions:

  1. Give cats one to two 1-mL pumps, for a dose of 250-500 mg L-lysine, twice per day as recommended by your veterinarian.
  2. Give kittens one 1-mL pump, for a dose of 250 mg L-lysine, twice per day, or as recommended by your veterinarian.
  3. Secure the cap tightly over the pump after administration.
  4. Consult your veterinarian about dosages during a flare-up of feline herpes virus.
  5. Administer paste directly into your cat's mouth, put it on the nose or paw, or add it to food.

Frequency of Use:

A typical Enisyl-F treats regimen consists of one dose administration per day. A standard Enisyl-F paste regimen consists of two dose administrations per day.


Keep out of reach of children and animals.

Store in controlled room temperature. Keep the paste cool.

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.

The active ingredient in Enisyl-F is the amino acid L-lysine. It inhibits the reproduction of viruses and enhances immune system function to combat the symptoms of feline herpes virus (FHV-1). Supplementation with this amino acid has been shown to lessen the duration and severity of breakouts and to prevent occurrences.

Enisyl-F is available over the counter.

Enisyl-F (L-Lysine)

Enisyl-F treats are sold in 180 g packages of 50 mg L-lysine treats.

Enisyl-F paste is sold in 100 mL canisters (250 mg L-lysine per mL), which may be purchased individually or in packs of 3 or 6.

Enisyl-F Treats Ingredients: Poultry meal, rice flour, corn flour, L-lysine monohydrochloride, sugar, salt, potassium sorbate, titanium dioxide

Enisyl-F Treats Guaranteed Analysis: Crude Protein (Min.) 30%, Crude Fat (Min.) 8.00%, Crude Fiber (Max.) 1.0%, Moisture (Max.) 15%, Ash (Max.) 8.00%

Enisyl-F Oral Paste Ingredients: Purified water, L-Lysine HCI, sorbitol, cod liver oil, xanthan gum, tuna flavor, soya lecithin, silica aerogel, caramel color, potassium sorbate, sodium benzoate

Enisyl-F Oral Paste Guaranteed Analysis: Crude protein (min.) 24%, crude fat (min.) 7.2%, crude fiber (max.) <0.1%, moisture (max.) 55.3%


Keep this product out of reach of children and animals. Do not use or store in or near open flame or heat.

Enisyl-F is intended only for use in cats. Do not give to dogs or other animals. Not for use in humans.

Administer Enisyl-F according to the instructions of your veterinarian.

CAUTION: Enisyl-F is not known to cause side effects. If you suspect an adverse reaction in your cat, mention it to your veterinarian.

Consult your veterinarian before using this product concurrently with other supplements or drugs.

Seek immediate veterinary attention if you know of or suspect an overdose.

Warranty and Manufacturer Information:

Made in Canada

Patent pending

Registered trademark of V toquinol N.-A. Inc.

V toquinol USA, Inc., 101 Lincoln Avenue, Buena, NJ 08310 (USA)

V toquinol N.-A. Inc., 2000 ch. Georges, Lavaltrie, QC J5T 3S5 (Canada)

V toquinol SA, B.P. 189, 70204 Lure Cedex (France)

Enisyl-F Oral Paste: NAC No.: 10050452

Enisyl-F Treats: NAC No.: 10050880