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Vetri-Lysine Plus Soft Chews

$28.72 $20.15 
Ships in one business day or less

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For Cats 120 ct
Price w/coupon SAVE20
You save $8
$28.72 $20.15 
Ships in one business day or less

Step 1. Select an Option:

For Cats 120 ct
Price w/coupon SAVE20
You save $8

Step 2. Select a Quantity:

Please select all product options.

Step 2. Select a Quantity:

Please select all product options.
Product Info
What is Vetri-Lysine Plus Soft Chews?

Vetri-Lysine Plus is a chicken liver flavored soft chew that contains L-Lysine, an amino acid that helps control herpes in cats. Along with the ingredient DMG, Vetri-Lysine Plus helps support immune system functioning, collagen formation and tissue repair. The chews are soft and bite-sized, so even kittens can eat them.


Cats and Kittens

  • Contains L-Lysine which helps control cat herpes
  • Made in the USA
  • Supports immune system functioning
  • Supports collagen formation and tissue repair
  • Small, easy-to-eat, chicken flavored, bite-sized soft chews
  • Supports antibody and Lymphocyte production
How it Works:

Vetri-Lysine Plus contains two active ingredients, L-Lysine and DMG, both of which support the immune system. L-Lysine is an amino acid that supports antibody, hormone and enzyme production. L-Lysine also helps control feline herpes, due to its ability to compete with L-Arginine, the amino acid which is required by the herpes virus to replicate. Along with L-Lysine, Vetri-Lysine Plus also contains DMG, which is a metabolite that is naturally produced by your pet's body in small amounts to support the immune response.


For animal use only. Keep out of the reach of children and animals. Safe use in pregnant animals or animals intended for breeding has not been proven. If your pet's condition worsens or does not improve, stop product administration and consult your veterinarian.

Brand Name:

Vetri-Lysine Plus

Active Ingredients:

L-Lysine and N,N-Dimethylglycine (DMG) HCl

What is this product used for:

Vetri-Lysine Plus is recommended to support proper immune response in cats. The ingredient L-Lysine can be used to control feline herpes.


Vetri-Lysine Plus is a non-prescription (OTC) product.

How this product should be stored:

Store in a cool, dry place.

What are the side effects:

There are no reported side effects.

What special precautions are there:

Some pets may consider this a treat. Keep out of the reach of pets. Safe use in pregnant animals or animals intended for breeding has not been proven.

In the event of an overdose:

Contact a healthcare professional immediately.

How should I store this product:

Store in a cool, dry place.

How to Use
  • Vetri-Lysine is for cats and kittens only.
  • Although some cats consider this as a treat, it is important to only give the recommended daily amount.
  • Contains L-Lysine, which helps control feline herpes.

Vetri-Lysine Plus has a chicken liver flavor appealing to most cats.

Adult Cat
All weights
Give 1-2 chews, twice daily
All weights
Give 1 chew, twice daily
Do not use!
Do not use!

Store in a cool, dry place.

Vetri-Lysine Plus:
Active Ingredients (per 2 chews)
250 mg
N,N-Dimethylglycine (DMG) HCl
50 mg
Inactive Ingredients: Brewers yeast, canola oil, chicken liver flavor, citric acid, glycerin, mixed tocopherols, propionic acid, proprietary blend (maltodextrin, sodium alginate and calcium sulfate), rosemary extract, silicon dioxide, soy lecithin, vegetable oil.
Customer Reviews
Vetri-Lysine Plus Soft Chews is rated 4.3 out of 5 by 15.
Rated 3 out of 5 by from Works but these are quite sticky These work and keep my cat from getting sick due to his low immune system thanks to Feline Leukemia and Herpes. However; these treats are very sticky and smell awful, he would not eat them whole. My mother had to dissolve them in some water and make what she called his "gravy". We moved on to the Lysine in a tube from Viralys on this site, it is much better and you only have to give 1/2 tsp daily.
Date published: 2016-05-29
Rated 5 out of 5 by from Great for supporting my cat's immune system My cat has feline herpes which suppresses her immune system. She once almost died after getting a serious virus during an extreme heat wave. Now the last couple of years she has been getting upper respiratory infections (even without exposure to outside or other cats). My vet recommended Vetri-Lysine for her when she was sick and now we use them all fall and winter. She has not ever gotten sick while taking them (usually 2 twice per day). Other folks mentioned their cats having trouble chewing them but I break them in half and my small cat has no trouble with them. She tends to get tired of them if fed just these so I mix in another kind of treat or two broken up with them and she eats them right up! I work 2 jobs and my vet charges $36/bag for these. They are worth it so I paid it, but I am so glad to have remembered this awesome site. I save $14/mo (more if I have a coupon code) and order multiple bags so I get free shipping. I am one happy customer of both Vetri-Lysine and 1800PetMeds. :)
Date published: 2015-12-09
Rated 3 out of 5 by from At first Raith ate one easily but after that it's been difficult, I'm not sure if it's the strong smell or what. He won't eat it straight or crumbled in his food. Crumbling is difficult with these. I'm currently trying to give him a bit of wet food with one chew cut up in it, but that seems a fruitless effort. I'm disappointed to say the least, I was hoping these would be a better value, since like other reviews the vets here want me to pay $40 for the same count bag but that requires him to eat SIX a day instead of two. Then they changed the brand....
Date published: 2015-11-14
Rated 5 out of 5 by from Old & Young liked it right away We have a cat who is over 8 years old, and we also have a young boy (almost 3 years). They both get very excited when I bring out the bag. I usually give one twice a day to each of them, and they both come running. The older one (without infections) seems more peppy and brave. We got the young one from Humane Society, and obviously, he had the herpes virus. He got really sick right away, and infected our very old cat (at the time). Worst part of a new kitten, is that they ALL seems to have that virus now. Literally: at least around here (WI). Causes major respiratory infections, asthma symptoms, runny green goo from eyes and with lots of sneezing. We'd get him healed up, and he'd get sick all over again from the smallest stressors. Now, he's got much more energy and not every stressor brings on a viral UR infection (like Dad going out of town for two days for work). Very worth it. Third darling cat doesn't like it, but she doesn't eat any kind of cat treat: ever.
Date published: 2014-10-09
Rated 5 out of 5 by from This really works! I have been giving this to my kitten ever since vet recommended it due to his upper respiratory & eye infections and possibility he has autoimmune issue(herpes). After getting infections under control w/ antibiotics vet suggested Lysine be continued on a daily basis. I didn't realize how much the Lysine was doing until I ran out for a few days and my cat began to show signs of yet another eye infection! Needless to say, I won't run out again!
Date published: 2014-07-31
Rated 5 out of 5 by from Before meal 'treat' Vet recommended L-Lysine for her weak immune system and skin reactions (hypoallergenic food too). While it's too soon to say, I have seen a reduction in sneezing, the snot being clear and water-y, instead of thick and green, and less itching/scratching. Plus, no recurrence of her bad ear infections. The trick is, to give it to them before you feed them anything else, otherwise picky cats like mine, will ignore it for the other food. Otherwise, she excitedly ran to me when I opened the bag, as opposed to the gel, which made her flee. It's kind of hard for her to break it down at times, but she's never choked and I bet it's beneficial for dental care like the dry food hardness. I preferred the ingredient list of this brand to the other dry supplement sold.
Date published: 2014-04-22
Rated 4 out of 5 by from good product These chews have been great! My cat loves the taste, which is good since they are hard for him to chew. They have helped with his chronic upper respiratory infections. Unfortunately, we adopted him with an URI, after 3 rounds of antibiotics the vet said she couldn't give him any more, so she recommended Lysine. This is much better then grinding up pills. He still gets sick but it's not as bad and it's short term.
Date published: 2013-07-21
Rated 5 out of 5 by from Great for feline herpes Like another reviewer, I bought a sphynx kitten who evidently had been medicated so as not to show her respiratory condition during the 5 hour drive home. Once in the house she wouldn't stop sneezing covering everything around with . . . Yuck. Vet said infection and went on 2 courses of antibioticswhich didn't work. I researched and found Lysine also smashing pills or powder version. Thank goodness for this product Miss B is now 1 happy sneezeless, hairless cat!
Date published: 2013-06-04
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Do I need an Rx to purchase the anti-viral treats?

Asked by: debi
They don't require a prescription, but it is always a good idea to have your pet seen by the vet and/or discuss starting this regimen with your vet.
Answered by: Quinn's Mom
Date published: 2015-12-10

will this product be beneficial for my fiv cat?

my vet recommended lyseine for our cat that has feline herpes, so I was wondering if it would be beneficial for my fiv cat.
Asked by: catnana
It certainly should be! Obviously, I haven't met your cat, but it has helped a lot with my own (3) cats' immune responses. Their immune systems were weakened from Upper Respiratory Infections as youngsters - they all seemed to have had feline herpes virus when we brought them home (separate litters, and one from the local Humane Society). Especially our youngest (age 3) gets stressed by any change or any of us being out-of-town, and will quickly develop a URI or even UTI. This has helped him a great deal with that!
Answered by: CatMom2014
Date published: 2014-10-10

Lysine Cat Chews

Can more than two cat chews twice a day be given to an 11 lb. cat? I have been giving the suggested amount for one week and there is still a discharge from her eyes. Please advise. Thank you!!
Asked by: CATNIP 3000
I assume you have a cat with herpes, like mine. There will always be some discharge (as told to me by my vet). After about 2 weeks of taking the vitamins it should be at a minimum however. When needed (about once a week), I use a warm wet wash cloth and clean his eyes for him.
Answered by: Military Wife
Date published: 2013-10-22

Is Vetri-Lysine Plus safe for a cat with diabetes

Asked by: Feline friendly
Due to the sensitive nature of diabetes, we would recommend checking with your veterinarian before introducing anything new into your cat's system.
Answered by: Jeremy W, PetMedPro
Date published: 2013-10-22

where made

Asked by: joe
Vetri-Lysine Plus is made in the U.S.A...
Answered by: Cherley Petmeds Pro
Date published: 2013-10-22

Is lysine beneficial to my cats that do not have feline herpes, to use as a dietary supplement?

Asked by: Debby
Lysine is an amino acid that helps support the immune system. It may not be needed in your situation if your cats are healthy and have a good immune system already. You should ask your veterinarian if he/she thinks its necessary.
Answered by: marty pharmacist
Date published: 2013-10-22

Long Term Usage of Vetri-Lysine

Is there a benefit to the health of my 9 year old cat to use this product long term?
Asked by: Moxie Bear
This product contains both L-Lysine and DMG, which support the immune system. L-Lysine is a naturally-occurring amino acid which inhibits the replication of the feline herpes virus. Adverse effects from long-term administration of L-lysine are extremely unlikely.
Answered by: Abby, PetMed Pro
Date published: 2013-10-22
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