Rx Vitamins Immuno Liquid Immune Supplement for Cats & Dogs, 4-fl oz bottle

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At a Glance

  • Immune Support
  • All Lifestages
  • All Breeds

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$36.39 Chewy Price
($9.10 /fl oz)
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$45.49 List Price
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About This Item

Details

  • Supplemental liquid that helps maintain a healthy immune system in your furry friend.
  • Contains l-lysine combined with immune-enhancing nutraceuticals to help boost immune function.
  • Helps protect nerve tissue, reduce the effects of free radicals and oxidative damage.
  • Highly-palatable liquid for easy administration.
  • Approved by the National Animal Supplement Council Seal (NASC).

Ingredient Information

Instructions

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Questions & Answers

4 Customer Questions

What are the mg of l-lysine?

Answer by Chewy • Jul 30, 2019
This supplement contains 500 mg of L-Lysine.

What flavor is 'original'?

Answer by Chewy • Aug 19, 2019
This supplement contains Fructose and other Natural Flavorings to make sure it is highly-palatable for your furry friend.

How long does a 2oz or 4oz bottle last if given daily? Looking to give to cat over 1-2 weeks.

Answer by Chewy • May 20, 2021
How long each bottle will last depends on your kitty's weight. Cats weighing less than 5 pounds should have 1 milliliter twice daily. Cats weighing more than 5 pounds should have 2 milliliters twice daily.

Safe for kittens 0-8 weeks?

Answer by Chewy • Apr 29, 2021
The Liquid Immuno supplement should not be used on kittens unless done so under the supervision of a veterinarian. This formula contains therapeutic levels of lysine and must be very carefully administered to a kitten.
Reviews
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4.3
Rated 4.3 out of 5 stars
33 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Effectiveness

85% Positive

Form and Administration

81% Positive

Ingredients

85% Positive

Nutritional Value

84% Positive

24 Customer Reviews

Rated 5 out of 5 stars
By David on Jan 10, 2026

For my cats

I’ve been using this Amino supplement for my cats for a long time. It’s to reduce inflammation and calm “Cat Herpes”, which is an upper respiratory disease acquired

I’ve been using this Amino supplement for my cats for a long time. It’s to reduce inflammation and calm “Cat Herpes”, which is an upper respiratory disease acquired when they were young. I will continue using to insure thier safety and wellness

Rated 2 out of 5 stars
By Jeannene on Dec 13, 2025

Doesn’t work well

My pets don’t like it and doesn’t work as well as the powder brand I’ve tried

My pets don’t like it and doesn’t work as well as the powder brand I’ve tried

Rated 5 out of 5 stars
By Karen on Jul 30, 2025

Keep on hand!

Helps dramatically with wound healing. I have 21 pups. Someone is always injuring themselves. Found this formula when I had a pit mix who absolutely would not keep

Helps dramatically with wound healing. I have 21 pups. Someone is always injuring themselves. Found this formula when I had a pit mix who absolutely would not keep licking her ankle raw. She was in a cone for nearly 1.5 yrs with no visible reason. Vet could not find anything either. Started her on this twice a day and she is finally free of the cone!!!!

Rated 4 out of 5 stars
By Tim on May 28, 2025

Bacon Flavor?

The bottle of Immuno Liquid that I received today looks different and says it is “Bacon Flavored”. Has it always been that flavor and this is new packaging or is

The bottle of Immuno Liquid that I received today looks different and says it is “Bacon Flavored”. Has it always been that flavor and this is new packaging or is this something new? Also, the bottle arrived ok because it was packed well, but the box took a beating (see photos).

Rated 5 out of 5 stars
By Dyan on Sep 21, 2025

My dog's skin seems smoother and shinier since we've been using this

I use this for my dog and cat and both respond well to it

I use this for my dog and cat and both respond well to it

Rated 5 out of 5 stars
By Jaynine on Nov 5, 2024

It works

My dog developed terrible k9 papillomas around her mouth and on the inside of her mouth. Three grew very large, two looked like fangs. I decided to try this and

My dog developed terrible k9 papillomas around her mouth and on the inside of her mouth. Three grew very large, two looked like fangs. I decided to try this and eventually added OVIR It. After 2 weeks of this I noticed they were considerably dried up. Thankfully she doesn't have sensitive taste buds and licked this up without issue and had no side effects. My other dog was not interested but she is incredibly picky. Then I added the OVIR IT and in combination two have finally fallen off! Hallelujah!

Rated 5 out of 5 stars
By marilyn on Mar 26, 2025

great item

helps my cat with her immune system. works fantastic my vet approves

helps my cat with her immune system. works fantastic my vet approves

Rated 5 out of 5 stars
By Kathleen on Nov 2, 2024

Takes for feline leukemia and happy cat!

My cat has been taking this for a few years as recommended by the vet as she has feline leukemia. So far she is doing great and I feel this product is really h

My cat has been taking this for a few years as recommended by the vet as she has feline leukemia. So far she is doing great and I feel this product is really helping!

Rated 3 out of 5 stars
By Susan on Nov 10, 2024

Who knows

I really can’t say if it’s helping my cat who has the herpes virus in his eye. I don’t think it can hurt.

I really can’t say if it’s helping my cat who has the herpes virus in his eye. I don’t think it can hurt.

Rated 5 out of 5 stars
By Jill on Jul 17, 2024

Perfect

This is exactly what I had been paying much more for at the vet. I was very happy to have found it on Chewy & at a lower price.

This is exactly what I had been paying much more for at the vet. I was very happy to have found it on Chewy & at a lower price.