L-Lysine Gel for Cats (5oz) – Supports Immune, Respiratory, and Eye Health. Eases Sneezing, Runny Nose, and Watery Eyes. Tasty Salmon Flavor – Made in The USA (2 Pack)
$ 33.99
Price: $33.99
(as of Mar 22, 2025 10:27:51 UTC – Details)
From the brand
Felisyl L-lysine Immune System Support Gel is a product designed to support the immune system of cats. L-lysine is an essential amino acid that plays a crucial role in various biological functions, including immune system function.
L-lysine is known to inhibit the replication of the feline herpesvirus, which is a common viral infection in cats that can cause respiratory and eye symptoms.
Immune System Support for Cats
Quality You Can Trust
The seal is an indicator that the product was made by a reputable company that is committed to transparency & ethical practices.
Immune System Support for Cats
Package Dimensions : 8.46 x 2.95 x 2.01 inches; 5 ounces
Item model number : Felisyl
Date First Available : August 25, 2021
Manufacturer : Pet Health Solutions / HealthyPets, Inc.
ASIN : B0DLPWPBCL
Immune Health Boost: Empower your cat’s immune system to fend off threats and maintain peak health. By strengthening their natural defenses, you’re investing in their long and joyful life.
Enhanced Respiratory Function: Breathe easy knowing your cat’s respiratory system is supported for optimal well-being. Whether they’re exploring indoors or embracing outdoor adventures, healthy breathing is vital.
Essential Amino Acid: L-Lysine, a crucial building block, ensures your cat’s vitality from the inside out. It’s the cornerstone of their well-being, promoting overall health and resilience.
Easy-to-Administer Gel: Hassle-free application that your cat won’t resist, making wellness routines a breeze. No more struggle or stress during supplementation – just a happy and contented feline friend.
Premium Quality: Crafted with care, our gel is a testament to the highest standards of quality and efficacy. Your cat deserves nothing but the best, and Felisyl L-Lysine Gel delivers just that.
Vet-Recommended Formula: Trusted by veterinarians for its proven benefits and positive impact on cats’ lives. When you choose Felisyl, you’re choosing a formula endorsed by those who prioritize feline health.
Happy and Healthy Cats: Witness the transformation as your beloved feline friend experiences newfound energy and joy. A healthy cat is a happy cat, and Felisyl L-Lysine Gel ensures plenty of both.
Customers say
Customers find the product effective in controlling sneezing and eye secretions. They appreciate its taste and ease of use. However, some customers have mixed opinions on value for money, cat sensitivity, smell, and eye shape.
AI-generated from the text of customer reviews
7 reviews for L-Lysine Gel for Cats (5oz) – Supports Immune, Respiratory, and Eye Health. Eases Sneezing, Runny Nose, and Watery Eyes. Tasty Salmon Flavor – Made in The USA (2 Pack)
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$ 33.99
Ariel K. –
Not sure if this works UPDATED!! Changed to 5 stars
**updated post after 72hours**I have been giving the recommended dose to my pregnant cat as well as my 6 month old kitten. My kitten is still super healthy, and the pregnant stray cat I brought indoors after being on this for 72hours is TONS BETTER!! She does still have minor nose discharge but we are keeping that clean with baby infant nasal mist, her discharge is no longer green anymore thankfully! She seems to be most the way past this sickness and with no history on her whatsoever itâs hard to know how long she was sick but when I took her in she was pretty bad off. This stuff is incredible! I am buying more. I will add as well, my kitten will be sleeping and I put a dab of this on my finger and put it front of her nose while she sleeps, she canât wake up fast enough to eat it off my finger LOL! Pregnant kitty actually enjoys it now as well since she can smell again, she laps it right up off my finger and wants more and more (of course we are not doing that, however she seems to think more is better) very happy and satisfied with this product! As long as it continues to work we will continue to buy and I will continue to keep this post updated!I took in a stray pregnant cat that no one was wanting to help. She has a UTI and is really struggling, vets are so outrageously overpriced I did some research and found this for her. For starters her nose is clogged so she canât smell it and therefore has no interest in it, but I still take the recrommended dosing and put it just UNDER her nose but above her mouth so she is forced to lick it and swallow it. That has been working for us very well, my young kitten (6months old) I have, is also getting this to keep her from getting sick and she absolutely loves this! We are on day 1 1/2 of this giving to the stray kitty and I do notice a decrease in her symptoms thankfully! I also use infant baby nasal mist to attempt to keep her nose clear much as I can without stressing her out more then she needs to be right now. I gave this 4 stars because Iâm not certain if itâs this or the baby nasal mist that is helping the most yet. I am also using a humidifier to help that congestion break up. I will come back in a couple weeks with an update of this stuff, to say if it actually works but for now Iâm giving it 4 stars until I can confirm it works.Side note her eyes are not goopy anymore and when I first brought her inside, her eyes were pretty gross. I have not touched her eyes at all so I know this is at least working for that.
Jhoana Campillo –
Improved health and cats love the taste
My biggest question when looking at reviews for this was do other cats like it and did it actually work? Iâll start by saying my cats love this and come running when they hear me open the cap. They think of it as a treat. Long story short, my indoor cat snuck out and came home with URI and got everyone sick. I took my 3 cats to the vet and they âprescribedâ them a bottle of Enysil-F and super over priced and other meds. While googling all the medications they got and and what each one was for I found out Enysil-F is sold by Amazon and no prescription was needed and for only 1/4 of the price the vet sold it to me for so I bought it religiously because it definitely worked and improved their health but my biggest problem was Iâd have to force feed my cats, they hated the taste and gagged. It was a battle and it was getting pricy for having multiple cats. I randomly saw this under suggested and was a little skeptical about switching over due to pricing. I assumed it wouldnât be as great of quality and perhaps not work as well but I was wrong. It helps my cats eye bogies and his stuffy nose and breathing has improved. We are definitely getting value for our money and itâs improved their health and cost less than Enysil-F with the same results but better because my cats love it. Note to add this bottle has more gel than the Enysil-F and itâs more affordable. My cats will need these vitamins for the rest of their life for eye boogies and it makes me feel better that I wonât have to fight them daily to take their gel vitamins anymore.
Royal9551 –
My cats love this stuff!
My cats love this stuff; better than maple flavored
Brittany Brooks –
THIS STUFF IS INCREDIBLE!!!!
My cat was sneezing a lot, his eye was watery, he was congested & a little sluggish. I was looking for something more natural to give him & found this. I do remember when I was younger my mom gave this to our cats who were under the weather. THREE doses, THREEEE doses (not quite 2 days), after I started giving Jinx this he started to perk up and his eye stopped watering. Shortly after that his sneezing was getting less and less and his congestion went away. He just finished day #4 and he’s doing SO MUCH BETTER. He’s stopped sneezing and is back to his old self again. THIS STUFF IS AMAZING, I’M SO HAPPY!!! BONUS: He loves it & will lick it right off my finger which is great. He’s a happy boy now.
Robin Burks –
Cat laps it right up and it works.
I’ve got a snotty orange tabby who’s had multiple visits to the vet for antibiotics and steroid shots. He’ll clear up for a few months and then get snotty again. So the most recent occurrence of snottiness (which usually leaves him feeling awful and not wanting to eat), I decided to try this. I was skeptical, but he began to clear up, and after about a week, he was back to himself. His appetite returned, his snottiness abated (there’s some, but it’s minor), and his behavior became playful again. He also looks forward to this as a treat and will lick it right out of the little spoon I feed it to him with. I’m not sure how long a tube of this will last, so I’m knocking off a star because the packaging could be better (I’m going to cut it open so as not to waste any).
Amazon Customer –
help for a stuffed up kitty!
My senior cat had been having a stuffy/runny nose with quite a bit of sneezing. It’s a large tube which should last for a while — and this along with some steam/vaporizer treatments have helped her to feel much better!
melissa dick –
Good idea
Easy to use but my cats wonât eat it.