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3-PACK Felisyl® Immune System Support (180 Soft Chews)

Item Number: 5939-3PK
Regular Price: $50.99Sale Price: $27.99
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Felisyl Immune System Support for Cats is a safe nutritional supplement for your cat if it has a condition that is responsive to L-lysine. L-lysine has been known to reduce the harshness and number of occurrences of herpes simplex viral infections. These infections result in fever blisters and cold sores. L-lysine is an effective ingredient of Felisyl Immune System Support for Cats.

In cats, the herpes virus is considered very contagious. What makes it so problematic is that it is a very common cause of upper respiratory infections (URIs). Symptoms of URIs include eye discharge and sinus congestion in your cat. You may also notice some squinting of the eyes and sneezing as part of the effects of an upper respiratory infection. Felisyl Immune System Support for Cats can help.

Felisyl is an easy to use nutritional supplement that kittens and cats alike seem to find tasty. It is easy to administer by simply mixing it in with their cat food.

Other benefits to Felisyl Immune System Support for Cats are that it helps promote healthy tissue, encourages respiratory health, and can even help with your catís vision. It is effective, easy to administer, and has some nice additional healthy side effects.

Administration: Approximately 1 to 2 Soft Chew L-Lysine daily.


chicken liver flavor, starch, L-lysine, water, soy lecithin, canola oil, brewer's yeast, glycerin, oat flour, barley flour, rye flour, oat meal, calcium sulfate, maltodextrin, sodium alginate, sobric acid, propionic acid (a preservative), mixed tocopherol blend (a preservative).

Guaranteed Analysis per Chew
Moisture ......... 18.6 %
L-Lysine ......... 250 mg

Give 1 - 2 chews daily.

Warnings: For animal use only.

Store in a cool dry place.

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

Felisyl® is a manufactured in the USA in FDA and USDA approved facilities following current Good Manufacturing Practice (GMP) GUidelines.

Customer Reviews

Click here to see all reviews
4.33 rating based on 9 reviews
by from 02/06/2014

Used as therapy treatment for my Tuxedo who was exposed to Feline Herpes as a kitten.

each by chew from wasWorks


My cats love it by Ely03/19/2013

I have two cats with herpes of the eye and both are happy to take 1 tab each am and pm.

GREAT discovery by Carol from Ft Lauderdale Fl05/30/2012

The cats don't know there's medicine in the chews, they think its a treat! They eat them up fast. I try and hide an Anixtane tablet in between 2 of the chews. Someone should make a pill pocket out of the soft chews.

Helped my cat a lot! by RaIrCo2412/06/2012

My cat had sores from her feline herpes and Felisyl helped a lot to let them heal and go away. Glad I purchased this.

Felisyl L-lysine by Joan from Michigan01/02/2012

I have used L-lysine for my cats with eye issues for about 2 years. I recently found this product and use is regularly as it keep their eyes clear and helps with irritation from herpes virus. This product is soft so was helpful for my friend who has an elderly cat who does not tolerate the hard treats. He also has had success with this product. I strongly recommend!

SERVICE by Cindy01/17/2015

After not receiving the product for weeks after my order this time...I called and was told it was back ordered with no expectation of delivery date. I cancelled the order and went to 1-800-pet meds. My cats needed that and it was detrimental to their health to have had to wait without any idea it was not available !!

Most Economical by Cindy from South Carolina11/01/2013

My vet had quoted me an outrageous price for Lysine when my cats came down with a herpes virus. This product keeps them symptom free at a fraction of the cost!

by from 02/23/2012

I recently purchased 3 packs of the Felisyl Immune System Support upon the reccomendation of my vet. Allof my 5 cats enjoy them and come running when I open the bag. It's still too early to determine the full effect, but I'm planning to keep feeding this product as a part of their daily diet.

Drexel Hill, PA by from Rob"


by Mar from Loudon,TN12/01/2011

I am giving the Felisyl lysine to 2 of my cats. They are not crazy about the treats but will eat them & that is all I ask. Too early to tell if lysine is helping the herpes.

he won't eat them... by puzzled1 from new york city09/11/2014

even if I break them up into tiny pieces. They're not soft enough for my old guy. I found another brand that are softer and he'll eat those.

My Cats Do Not Like These by Christine01/29/2013

I thought I would try these Lysine Treats becasue the price was much better than the Enisyl-F Lysine Treats. My one cat will not eat them & my other cat throws them up right after. I would not recommend them if you cat is picky or has a sensitive stomach.


Questions and Answers

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