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๐พ Keep your cat thriving with every lickโbecause healthy cats are happy cats!
Felisyl L-Lysine Gel is a vet-formulated, salmon-flavored daily supplement delivering 1000mg of L-Lysine to support immune function, ease respiratory symptoms, and promote eye health in cats and kittens. Made in the USA under NASC-certified standards, itโs designed for easy administration and trusted by pet parents to reduce sneezing, congestion, and watery eyes, helping cats stay vibrant and comfortable year-round.
























| ASIN | B00MO9SHBE |
| Active Ingredients | L-Lysine Monohydrochloride |
| Allergen Information | Codfish Free |
| Best Sellers Rank | #2,871 in Pet Supplies ( See Top 100 in Pet Supplies ) #15 in Cat Supplements & Vitamins |
| Brand | Felisyl |
| Brand Name | Felisyl |
| Customer Reviews | 4.4 out of 5 stars 2,263 Reviews |
| Flavor | Gel (5 oz.) |
| Global Trade Identification Number | 00814087006547 |
| Included Components | 1 |
| Item Form | Gel |
| Item Type Name | Felisyl L-Lysine Gel for Cats - Immune System Support - Supplement Support for Healthy Tissue, Respiratory, and Vision - Salmon-Flavored - Made in the USA - 5 oz |
| Item Volume | 5 fluid ounces |
| Manufacturer | Pet Health Solutions / HealthyPets, Inc. / Sogeval |
| Manufacturer Part Number | FEL6547 |
| Model Number | FEL6547 |
| Number of Items | 1 |
| Pet Type | Cat |
| Product Benefits | Aids Respiratory & Eye Health - Helps reduce the frequency and severity of respiratory discomfort, sneezing, runny nose, and watery eyes associated with environmental stressors., Eases Upper Respiratory Symptoms - Promotes normal respiratory tract function, making it ideal for cats prone to congestion, nasal discharge, or seasonal flare-ups., Helps Manage Stress-Related Flares - Supports a healthy immune response during stressful events like boarding, vet visits, moving, or changes in routine., High-Palatability Salmon Flavor - Smooth and tasty gel makes daily dosing easyโgreat for picky eaters who dislike powders or chews., Ideal for Kittens & Adult Cats - Safe and gentle enough for kittens while providing effective daily support for adult and senior cats., Supports Strong Immune Function - Delivers a daily dose of L-Lysine, an essential amino acid that helps maintain normal immune defenses and keep cats healthier year-round. Product Benefits Aids Respiratory & Eye Health - Helps reduce the frequency and severity of respiratory discomfort, sneezing, runny nose, and watery eyes associated with environmental stressors., Eases Upper Respiratory Symptoms - Promotes normal respiratory tract function, making it ideal for cats prone to congestion, nasal discharge, or seasonal flare-ups., Helps Manage Stress-Related Flares - Supports a healthy immune response during stressful events like boarding, vet visits, moving, or changes in routine., High-Palatability Salmon Flavor - Smooth and tasty gel makes daily dosing easyโgreat for picky eaters who dislike powders or chews., Ideal for Kittens & Adult Cats - Safe and gentle enough for kittens while providing effective daily support for adult and senior cats., Supports Strong Immune Function - Delivers a daily dose of L-Lysine, an essential amino acid that helps maintain normal immune defenses and keep cats healthier year-round. See more |
| Specific Uses For Product | Active |
| Target Species | Cat |
| UPC | 814087006547 |
| Unit Count | 1 Count |
| Vitamins And Minerals | 1000 milligrams |
| Volume | 5 fluid ounces |
| Warranty Description | 1 Month |
A**.
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 itโs 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 canโt 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 canโt 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 Iโm not certain if itโs 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 Iโm 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.
A**.
My Cat Is Obsessed...
Though she can only have it twice a day, this is now my cat's favorite TREAT! She is absolutely obsessed with the flavor! So: Kitty Approved. As for the human's opinion, I CAN say I've seen a noticeable difference. Before: she was lethargic and losing weight rapidly, which the vet suggested was due to her inability to smell after months of sneezing and congestion with no apparent cause beyond 'allergies'. I could hear her nose whistling with every breath and I was fearful we were at the end of my precious cat's time here. After: since starting her on 'Felisyl L-Lysine Gel' she's completely turned around. I haven't heard the wheeze/whistle and she's eating regularly, including demanding 'cookies' (aka crunchy treats). Her weight is back to normal and she's more alert! I HIGHLY recommend giving this a try if your cat is suffering with respiratory issues!
K**E
So Far So Good. Kitty Approved!
So far, I am pleased with this Lysine gel for my Ragdoll Kitty. I got it because my kitty was suffering from red, irritated eyes with an occasional sniffle / sneeze. I decided to try and treat this internally rather than dealing with eye drops for this problem in her eyes since it would cause her stress and it is topical so the problem would probably continue without keeping that daily regimen up. I needed something systemic and more favorable to my kitty and she is treats and food driven. I was concerned a bit with some of the reviews dealing with quality control and I am happy to say that all is perfect. It smells great, and my cat loves it. She goes for it with the gusto of eating a Churu. She has only had several doses, but I can already see improvement in the redness in the whites of her eyes. I am so happy. Happy cat, happy life. I started on the minimum dose of 1/8th tsp twice a day and I wait to give it to her on a full stomach to avoid some of the digestive upset that can occur as a side effect. The amount you get in the tube is very affordable compared to others in oral drops or other powders and gels that are super expensive on dosing average. I also felt confident to purchase Felisyl due to it receiving the seal of approval from the NASC and believe it or not, during my research of Lysine products, it is even recognized under Good RX for its health benefits and prevention maintenance for my beloved feline along with several other vet formulated lysine products, but they were double to triple the purchase price. Very happy with my decision and hoping she continues to improve in her health, allergies and keeping her immune system well and strong. This product is so much cheaper than a Vet bill or repeat visits because the symptoms are only treated instead of trying to clear the underlying condition that this gel or more like a paste actually does for her internally and systemically. Allergies begone.
M**N
Great In A First-Timerโs Pinch!
This stuff seems great! In just three days, a kitten who had one leaky eye closed, and another who was the worst off with crusted-over closed eyes and mucus oozing out the eyes and nose, were able to eat, drink, explore and groom themselves again! That first one looks, and acts, normal but Iโm still administering the medicine to them and they love the taste. The second is making great recovery towards eating dry kibble on their own, and drinking water, but makes a fuss over ingesting the medicine, so I have to scoop some onto my finger, gently coax their mouth open while holding them in place by the scruff, and line their tongue with it. This one also turns away from eating canned food, now, which were never a problem before the upper respiratory issues occurred. The positives about this supplement are it seems to have a fantasticallyโalmostโirresistible flavor cats and kittens love; itโs easy to squeeze out; finger-feeding isnโt difficult, just tedious. This product is quite creamy, with a teeny-tiny bit of stiffness similar to something like mayo; itโs not runny, until reaching its last few remnants that more so โsneezeโ out of the tube rather than glide on like normal.๐คฃ The negatives lie within the instructionsโin the sense that youโre supposed to give a certain amount, twice, daily for three to four weeksโฆwith only five ounces of product!๐คฃ I bought this four days ago and practically ran into fumes by morning of that fourth day!๐คฃ๐คฃ Of course, Iโve also been handing out dosages to about five outdoor-only cats (with those in the roughest shapes, who wonโt lick the product off the spoon, temporarily brought indoors for the finger-feeding)! Even for someone not giving this supplement to multiple kitties who started getting the sniffles, sneezies, and the watery eye goop that kept them shut, this stuff still wouldnโt last the expected three to four weeks! Counting the dosages given daily, there have only been about 16 total, in that tube. If a single cat were receiving the recommended two servings a day, I guesstimate that would only last a little over two weeksโdefffffinitely not reaching the three, let alone four, week expectationโฆwhich is a brilliant marketing strategy haha. And it worked, because I just ordered a second tubeโbut I am also exploring other options, and will likely leave the gel usage for those who refuse to lick it off a spoon, or any dab to their nose, and must be finger-fed. Iโve also been using it in conjunction with a high calorie supplement for those with the lowest energy, and had the scraggliest looks. Both supplements, together, are doing well! Overall, this product was perfect for my โOh no! I need L-Lysine, fast!โ situation, and has been showing results! They certainly havenโt been instant, but observing that kitten who was the absolute worst off, out of the rest of the stray colony, gradually perk up in the beginning stages of returning to normal gives a little relief that something MUST be working. They can open both eyes about halfway, now! My only gripe is, I wish this tube were at least triple its sizeโfor the same price!๐คฃ
T**Y
Highly recommend!
My cats like the taste and it helps with their sniffles and occasional runny eyes, also helps with hairballs too. I only apply a tiny bit, the size of a pea on one paw because if too much is applied it will give them a loose stool. I use on my cats once a week only. Works well, cats feel better.
A**R
Cat approved, seems to work!
My cat likes it, and it seems to work! I don't know what else to say about it, really. The tube is bigger than what I'll ever use, but I'm glad to give my cat some relief while he gets better again.
G**.
It does what it claims to do!!!!!
This 'L-Lysine Gel for Cats & Kittens' really works... My 8 month old, Willow about 6 or 7 days started wheezing & sneezing. I don't have the money for the vet call, so I go when I need something, Amazon of course. I read all the reviews & check how many people bought this B4 I purchase it myself. Amazon didn't let me down. This Gel i give bout 1/4 teaspoon morning and another at night, after 4 days now has cleared up her issues not completely yet but is working great so far. I'm Convinced in another 3 to 5 days Willow is going to be back to her normal self. So my conclusion is this Gel does what it claims it is going to do. It's a Great find, and I will continue to by this name brand for any future issues my fur babies might have..
S**N
Not consistent with formula.
My cats loved it until I received one bad batch and now they won't touch it. It does work but expensive. I have switched to the crunchy treats for now.
Trustpilot
2 weeks ago
5 days ago