DURALACTIN Feline L-lysine Cat Supplement, 32.5-mL syringe - Chewy.com

Duralactin Feline L-lysine Cat Supplement, 32.5-mL syringe

By Duralactin
Rated 3.9461 out of 5 stars

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About This Item


  • Helps manage chronic inflammatory conditions in 4 to 7 days with peak effects seen in 10 to 14 days and helps maintain respiratory and ocular health especially in your cat who is physically stressed.
  • Give this supplement to your furry friend alone or with other therapies, it does not inhibit COX-1 or COX-2.
  • Use this purr-fect supplement short or long term.
  • Contains MicroLactin, a protein derived from milk, plus L-lysine, for use in your cat or kitten with conditions responsive to MicroLactin and L-lysine.
  • Feed this delicious poultry paste directly to your feline friend or with food.

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Nutritional Information

Feeding Instructions


Questions & Answers

27 Customer Questions

This will treat a uperespertory infection in cats
Answer by ChewyDec 11, 2017
This product is recommended for use in cats and kittens to help support respiratory and ocular health while managing inflammation.

Is this good for feline herpes?
Answer by ChewyNov 22, 2018
L-lysine is often used to help with various ailments, including viral infections and feline herpes virus. L-lysine has been shown to reduce the severity and the duration of the feline herpes virus. It halts the replication of the virus by interfering with another amino acid called arginine, which the virus needs in order to replicate.

Does the Duralactin Fleine L-Lysine Paste have to be refrigerated after opening?
Answer by ChewyMar 30, 2022
This Feline L-lysine supplement should be kept at room temperature even after opening.

What does "poultry recipe" mean?
Answer by ChewyJun 14, 2018
"Poultry Recipe" is referencing the inactive ingredient poultry digest that is used in the supplement.

ReviewsWrite a Review

Rated 3.9461 out of 5 stars
204 Ratings
Would recommend to a friend

204 Customer Reviews

Rated 3 out of 5 stars
By JoJo on Mar 27, 2023

Hopeful that is going to work.

So, we have a kitty that has chronic upper respiratory issues and was misdiagnosed with FIP—L-Lysine seems to clear up her sinus issues quickly, except she doesn’t like the taste of the powder, it’s messy, and she doesn’t like taking it with food. She laps this stuff up like a dream. Every morning and evening she hops on our table and meows that she’s ready for her “treat”. We just put in her food bowl, and she licks it up. I gave 3 stars because I see it working, but want to make sure it’s fully effective before giving 4 stars. The 5th star is lacking because this stuff is pretty expensive for only 6.5 days of treatment. Overall, it’s a pretty good product.

Rated 5 out of 5 stars
By Chunk on Mar 30, 2023

L-lysine paste

I feed this to my cat twice today 3/29/23 my cat gets these puffy eyes and he gets congested with watery eyes he coughs and sneezes he will look uber the weather so i ordered this because his dr will give him treats he won't eat the treats so i decided to order this to see how well it works. What a difference i know it said results in 3 to 4 days but i can hear a difference in him already. Thank you is your cat had issues with their respiratory system this week help.

Rated 5 out of 5 stars
By tbt55 on Jun 5, 2023

Works Great

This clears up my cats sneezing, stuffy nose and occasional cough! I just put the syringe in the side of her mouth and dispense the recommended amount.

Rated 5 out of 5 stars
By Nelia on Jan 2, 2023

This works on Calici virus

I have five rescue cats, all with a variety of medical conditions …and now with Calici virus. The flare-ups were getting much worse with the originator (2 times a month)so my vet recommended this. Wow!! Within two weeks, the flare-up ceased and we have yet to have another- it’s been three months. He loves it, I just wish the others would show interest (it’s the texture). It’s expensive but cheaper than vet visits!

Rated 5 out of 5 stars
By LadyBlu on Dec 2, 2022


My 4 Mt old kitten Callie has Feline Respiratory diease, she was so sick, I'd taken her to vet 3 times and she still looked so bad, I'd read about the L-Lysine on line, it honestly saved her. She was better by the time I had given it to her and Charlie also by 6mt old kitten, who was sick but not as bad as her. They love this stuff, I yell "Guys, come get your medicine they run and fight for who's getting to lick it off my finger first." Ordering more today....

Rated 3 out of 5 stars
By Bill on Jan 24, 2023

Didn't help.

Tried this for our cat's eye watering. Took many wasted tries to get her to eat this. Finally did. No help for her eye problem.

Rated 5 out of 5 stars
By Sarah on Oct 19, 2022

not expired- date listed is date of manufacture

We adopted our kitty a little more than a year ago. He got an upper respiratory infection and conjunctivitis (as well as ringworm) shortly after bringing him home- likely from foster care. This stuff helped so much! He was good as new in no time! Our cat has a cold again and this seems to help. Date listed is date of manufacture, not expiration fyi

Rated 1 out of 5 stars
By Beesmamz on Dec 18, 2022

She wouldn't touch it

She loves lysine treats but hated this she wouldn't eat her food with it in there either...back to the drawing board

Rated 5 out of 5 stars
By CINABON2022 on Nov 19, 2022


My cats love this . Their congestion has been significantly reduced since they have been taking this product. I highly recommend it.

Rated 3 out of 5 stars
By gacken697 on Aug 10, 2022

good product, terrible delivery method

This tube is the same size as my horse De-wormer. The tip was WAY too big to get in my cats mouth, so I got a smaller oral syringe (3cc) and dispense the 2.5cc into that then give it to my cat. I'd like it more if the tip was smaller