RX VITAMINS Amino B + K Liquid Kidney Supplement for Cats, 4-oz bottle - Chewy.com

Rx Vitamins Amino B + K Liquid Kidney Supplement for Cats, 4-oz bottle

By Rx Vitamins
Rated 4 out of 5 stars
$25.56Chewy Price
$26.00Chewy Price
$24.28Autoship Price
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About This Item


  • Highly-palatable liquid that supports kidney health and renal function in your furry friend.
  • Provides potassium as well as additional nutritional support for your pet with a dense nutrient profile.
  • Features a liver and bacon flavor for increased palatability.
  • Contains B complex vitamins, aqueous liver fractions and essential amino acids.
  • Approved by the National Animal Supplement Council Seal (NASC).

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Nutritional Information

Feeding Instructions


Questions & Answers

3 Customer Questions

Is this flavored?
Answer by ChewyDec 15, 2021
This supplement does not contain any flavoring. For a complete list of ingredients and the guaranteed analysis, click the “Nutritional Info” tab on the product page.

Is this a prescription or over the counter?
Answer by ChewyJul 21, 2021
This supplement does not require a prescription.

What are the ingredients and % amounts? How much Taurine do cats need in their food?
Answer by ChewyAug 17, 2020
The key ingredient in the Amino B+K is potassium gluconate. There are 468 milligrams per 2 millilitre. This formula is designed for the patient with hypokalemia and should only be given under the supervision of and only if recommended by a veterinarian. It is not meant to be used as a taurine supplement. There is not a sufficient level of taurine in the Amino B+K for it to serve as a taurine supplement.

ReviewsWrite a Review

Rated 4 out of 5 stars
10 Reviews
Would recommend to a friend

10 Customer Reviews

Filter by reviews that mention

Rated 5 out of 5 stars
By Christine on Jan 10, 2023

Miraculous for low potassium

I got this at the advice of my veterinarian because my kitty with IBS had low potassium show up on his blood work. After a couple of months using this twice per day, his recheck showed normal levels. However, at that time I stopped giving him the supplement because his levels were normal, and one day a few months later, my poor kitty seemed very weak and unable to lift his head out of the blue! His blood work showed low potassium levels again (everything else was normal). Just 2 days on this supplement, given 3x per day this time, he was completely back to normal. It truly works, and I will keep him on this for life now! As for the taste, thankfully he's fine with eating it mixed into his food, or licking it off my finger. It smells like bacon. If your cat will eat this and his potassium is low, I highly recommend using it. Maybe all the ingredients aren't the best, but the proof is in the results.

Rated 3 out of 5 stars
By jazzcat on Jan 27, 2023

Cat hates it

The vitamin flavor in this is very strong both in smell and taste and I'm not able to hide it in her food and unfortunately because of her other health problems I am not able to administer it into her mouth with the dropper because that causes an asthma attack and she already has acute breathing issues.

Rated 5 out of 5 stars
By Wilson on Nov 7, 2022

tasty medicine

My human just squirts a few drops onto my canned food. Yummy. also, approved by my veterinarian.

Rated 5 out of 5 stars
By catwhisperer on Jun 19, 2022


My elderly cat is having issues with absorbing nutrients, & my veterinarian recommended Amino B+K. It arrived from Chewy very quickly. When it came time to give him the first dose, I was a little apprehensive, as he's one of my pickier cats. He seemed VERY interested in how it smelled, so I offered it to him in a bowl. He was not impressed enough to lap it up. I used the dropper to give him the first dose, & he didn't mind at all, which can be HUGE for fussy cats who don't like oral medications/vitamins, etc. He's being very good about taking this every day.

Rated 4 out of 5 stars
By SuzyQ on Oct 7, 2021

My cat likes!

This liquid is easier to administer than the Renal K gel. My cat laps it from the dropper and likes the taste. Only problem is you have to give a lot of the liquid compared to the gel. It’s just nice that he enjoys it more.

Rated 5 out of 5 stars
By Lewis on Dec 31, 2021

Supplement purchase

Exactly the same stuff I was getting from my vet for a third of the price! Great deal!

Rated 2 out of 5 stars
By lmon1 on Oct 5, 2020

I am still trying to find a way to hide this

trying to add it to wet food made the whole plate of food sit there untouched. My cat that needs the supplement won't eat it, the other cat just ate it. I didn't give it a good rating because it likely doesn't taste good, the bottle and price too big for testing a product out

Rated 5 out of 5 stars
By cwolfe on Sep 8, 2020

Improved kidney function measurements

My 18-year-old cat had a bad UTI, which was cured easily with a brief course of antibiotics, and also declining kidney function. Instead of buying expensive kidney-care prescription food, I researched what ingredients differentiated that food from a basic recipe. This supplement seemed to cover most of those. I ordered it and began adding it as recommended to my cat's regular high-quality canned paté (she rotates among Instinct, Wellness, and Purina Pro Plan Prime Plus). At her next vet visit, of the three measures of kidney health, two had actually improved a little, and the third had declined by only a fraction—which is pretty amazing at her age. Always follow your vet's advice, but especially if you have a finicky kitty who won't eat the prescription food, this might be worth a try. As for taste, my cat eats her food more eagerly with the supplement applied. Keep in mind that what smells bad to us may appeal to cats!

Rated 1 out of 5 stars
By Anna on May 5, 2020

Disgusting and offputting

My cat hates and loathe it too. Smells and tastes terribly. Waste of money.

Rated 5 out of 5 stars
By Disappointed on Aug 21, 2019

My cat eats it every time...

Twice a day I add this to his bisque, broth or souped-up pate (whatever the flavor they may be) and he eats it- so it must be palatable to him. Please check the “precautions” listed here and be sure this is what your pet needs (run it by your Vet) because potassium % is greater than vitamin B12, as listed.