VETOQUINOL Viralys (L-Lysine) Oral Gel for Cats, 5-oz & Vetoquinol Enisyl-F Lysine Bites Chicken Liver Flavored Cat Treats, 6.35-oz bag -

Bundle: Vetoquinol Viralys (L-Lysine) Oral Gel, 5-oz + Enisyl-F Lysine Bites Chicken Liver Flavored Cat Treats, 6.35-oz bag

By Vetoquinol
Rated 3.1538 out of 5 stars
$50.98Chewy Price
$48.43Autoship Price
Autoship (Save an extra 5%)

Why Autoship?

  • Save 5% on all future Autoship orders
  • Set your schedule based on your pet's needs
  • No fees, no commitments - skip, change or cancel anytime.

In Stock
FREE 1-3 day shipping

About This Item


  • Comes with a 5-ounce tube of Vetoquinol Viralys (L-Lysine) Oral Gel for Cats and a 6.35-ounce bag of Vetoquinol Enisyl-F Lysine Bites Chicken Liver Flavored Cat Treats.
  • Gel has a highly-palatable flavor that cats love.
  • Treats are nutritional supplements that help reduce the severity and duration of symptoms.
  • Both products help reduce inflammation of the eyes, conjunctivitis, squinting, sneezing, sinus congestion and more.
  • Both products are made in the USA.

See More

Play Video: Learn More About Vetoquinol From Our Team of Experts
Learn More About Vetoquinol From Our Team of Experts

Trusted Immune System Support

Adding L-lysine as a supplement to your cat's diet is an easy way to help support her long-term health. As a market leader with a wide range of L-lysine products, Vetoquinol puts this active ingredient in tasty chews and bite-size morsels, plus paste, gel and powder form so you can find the best way to offer it to your kitty. These supplements are specifically designed for felines to support the immune system, and maintain respiratory an

Seal of Quality

Out of thousands of animal supplement companies, only a hundred are audited NASC members, including Vetoquinol. That means they've undergone a comprehensive quality audit to earn the NASC Quality Seal. Displaying this seal on their products means that you can rest assured that they are committed to following the highest current standards of quality in the industry.

Enisyl-F & Viralys Products

Specially formulated Enisyl-F was the first lysine-based nutritional supplement developed for veterinary use for kitties. Supplementing with L-lysine is helpful for managing the symptoms of upper respiratory infections in kittens and cats that were strays, and those in shelters.


Veterinarian formulated to deliver just the right dose in a treat with cheese, chicken, liver and hickory smoke flavors.


Tiny mouthfuls of L-lysine disguised as a delicious snack with savory chicken fat and chicken liver.

Oral Paste

Highly palatable paste that can be given by mouth, mixed with food, or even applied to paws for your cat to lick off.

Oral Powder

Delivers L-lysine HCl in a powder with fish and poultry liver flavors that cats crave—just sprinkle it on top of food.

Oral Gel

Cats only need a small amount of this extremely palatable gel to get the benefits of L-lysine HCl.

About Vetoquinol

Vetoquinol is a family-owned company devoted exclusively to finding innovative solutions for animal health issues. They've shown more than 80 years of dedication, researching everything from oral hygiene to urinary and kidney health to create products that are effective and safe for the pets you love and care about. Founded in 1933 with an expertise in pet pain management and veterinary resources, Vetoquinol has gained the continued trust of pet parents and vets worldwide.
Shop Vetoquinol

Questions & Answers

3 Customer Questions

Are the treats crunchy or chewy?
Answer by ChewyMar 23, 2021
These treats have a crunchy texture.

Where is the L-Lysine sourced?
Answer by ChewyApr 12, 2021
The L-lysine is manufactured in Princeville, Canada.

How many treats are estimated to be in a bag?
Answer by ChewyDec 19, 2020
The quantity of treats will vary due to this product being based on weight.

ReviewsWrite a Review

Rated 3.1538 out of 5 stars
13 Reviews
Would recommend to a friend

13 Customer Reviews

Filter by reviews that mention

Rated 2 out of 5 stars
By Bill on Jan 24, 2023

Waste of Money

Our cat ate one of the chews. Would not go near them after that. Eats all other kinds of treats. Took one lick of the gel and would not try it again. Complete waste of a lot of money.

Rated 3 out of 5 stars
By pittsburgh on Dec 1, 2022

good and bad

I was surprised my cat liked the maple flavor, but he really does! No forcing necessary; he licks it off my finger. But the treats were a no-go, nothing doing.

Rated 2 out of 5 stars
By fountain on Sep 22, 2022

Not woth it

The treats are so hard my cats can't eat them. I have to chop them up and sprinkle on their food. The paste is useless. None of my cats will eat it. I even put it on their feet, still wouldn't eat it so I had sticky paste smeared on everything. Hopefully I can find someone who can use it so I don't feel like I've completely wasted my money.

Rated 1 out of 5 stars
By MoreCatsPlease on Oct 16, 2022

nobody likes the taste

None of my cats like either the bites or the gel. I used Enisyl years ago when the two older ones were kittens and now I was hoping they would benefit from it for some ongoing issues. Sadly this isn't much use if the cats won't eat them.

Rated 1 out of 5 stars
By Monster on Dec 30, 2022

Enisyl-RLysine Bites

Will never get these again, Monster will not eat these. Picks them out of bowl to spit them out!

Rated 5 out of 5 stars
By Jeanie on May 7, 2022

Viralys oral gel & treats

I got this because I have some order cats that I thought it would help. So far so good. Seem to have better luck with the gel then the treats.

Rated 1 out of 5 stars
By Snagglepuss on Jan 17, 2022

Enisyl-F Lysine Bites

These are extremely hard and my cat had a hard time chewing these. I even tried to pulverize them and they wouldn't crush. Would love a refund on these as I will not give to my cat now. Unless your cat is a mountain lion (mine is a ninja) then I would not recommend. I didn't want him to break his teeth. I do recommend the gel, but that get's expensive because you have to use alot.

Rated 3 out of 5 stars
By Mema on Apr 14, 2022

Good for them not always liked

I know this is good for pride but most don’t like it in their food. The treats are liked sometimes but not always.

Rated 4 out of 5 stars
By Zack on Feb 13, 2022

Mixed review

My male loved the bites. My female turned her nose up at both the bites and gel. Unfortunately, she is who I bought it for. Bites no harder than regular kibble.

Rated 4 out of 5 stars
By CCMart on Nov 21, 2021

Better than I thought

Previously, I questioned how to get so many bites at one time. If I could get the 24 down a day, I’d give this a 5 star rating. But, I’ve gotten my cat to take 7 in morning and 7 at night. He doesn’t eat on his own but willing to sit there as I throw each bite in. For those that need lysine this is a good alternative. Small bites so easy to administer. I can’t get his congestion to depart, but it does help to manage his congestion. The paste I will use in the morning and the bites at night, as a change. I like the pricing of the dual packaging