Product Description
Enisyl F is an oral paste L-Lysine HCL Nutritional Supplement for cats. Enisyl-F is used for treatment of Feline Herpes Virus (FHV-1). EnisylF is a palatable lysine base that comes in a unique pump for easy administratio… More >>
3 Pack Enisyl-F Oral Paste for Cats – 300 mL



In response the ‘virologist’ that states that L-Lysine has no documentation that it works, I beg to differ. There are numerous studies in the human population that suffers from Herpes Simplex that L-Lysine works. (I was in one of those studies!) Extrapolating this to the feline population that suffers from Herpes, albeit a slightly different version, it can be assumed to work. Anecdotal reports from cat owners such as myself give testimony to it’s effectiveness.
My personal anecdote is that my Persian was suffering so severely from Herpes in his eyes that his ophthalmologist (yes, there is such a thing as a cat ophthalmologist) felt she was going to have to extract his left eye and possibly both eyes. After 2 months of treatment with multiple anti-virals, antibiotics and anti-inflammatory drugs, my cat still had corneal ulcers from the Herpes so severely that even I was considering allowing his ophthalmologist to remove at least one eye. I could see no other way to stop his obviously severe pain. And to this day, his corneas are visibly and severely scarred from those ulcers.
Finally, his ophthalmologist suggested L-Lysine at 400 mg per day. When that did nothing, I upped his dose to 1,000 mg per day after reading on the Internet that it often took that much to be effective. Within 3 days, I could see a huge improvement. Within another week, his eyes were healed. After having chronic eye infections for his entire 2 years of life, he didn’t get another infection for a year and a half. At that time, I upped his dose again to 1,250 mg per day and he is again free of infections.
L-Lysine doesn’t cure Herpes. Once a cat has Herpes, it is for life. What it does is interfere with the replication of the virus, which damages the tissues and allows ’super’ infections caused by bacteria to develop.
Oh, and I forgot to say that prior to my being in that L-Lysine study for herpes simplex type that I suffered from herpes outbreaks 2-4 times a month since I was a very young child. I have had only 2 or 3 outbreaks since that study and only when I slack off taking my L-Lysine. That study was nearly 20 years ago. I think that anecdotal report is pretty telling, as well!
Rating: 5 / 5
My vet originally recommended Enisyl for my kitten who was struggling with chronic upper respiratory infections. The Enisyl, combined with antibiotics took care of the flare up. Now I give him Enisyl whenever he starts to show signs of getting sick (usually the eye starts twitching), and so far we’ve successfully avoided another bout for five months. Lysine is not meant to attack the virus itself, but rather helps the cat’s immune system do a better job. I’m no virologist, but to me, it’s worth the money to avoid expensive trips to the vet and extra medications.
Rating: 5 / 5
Last winter I adopted three cats who were trying to survive in the dumpster of the apartment complex where I live. I spent a considerable amount of time and money on these kitties, and was very happy with their adaptation from hungry, skittish strays to loving, healthy companions.
About four months ago, one of my not-so-animal-loving neighbors trapped Dexter, the biggest and oldest of the bunch, and took him to the local animal shelter. Lucky for Dex, I found him in time – scared witless and more than ready to come home. Within days he came down with an upper respiratory infection, which (according to the vet) was what caused a nasty eye infection. THANKS NEIGHBOR!
Of course ALL the cats became infected, and I dutifully administered the antibiotic eye ointment prescribed. At first it seemed that the ointment did the trick, but the goopy-nasty eyes and the runny noses came back within a week after the ointment was gone.
The vet recommended Enisyl-F Oral Paste, and being pretty tired of taking them back to the veterinarian clinic, I gave it a try.
I noticed an improvement in FOUR DAYS. Now there is no more cat sneeze and ucky-eye-goop to worry about in my home environment. No more having to totally disinfect everything again and again and AGAIN. No more having to medicate my cat-herd four times daily. Currently I dose them all once daily, a full pump each morning, and am keeping close watch to see if they might need more. So far so good – they are looking great!
I am no “retired virologist” and not even remotely close to being a scientific type of person, but I can attest that this stuff really works. Enisyl-F is highly recommended by one of the top veterinarians in my town, and now, wholeheartedly by me – self-proclaimed cat lover.
Rating: 5 / 5
My kitten unfortunately was diagnosed with Feline Herpes. After the 4th or 5th eye infection in a short span of time, our vet concluded that this would be the life I’d have with this kitty unless I tried L-lysine. LET ME TELL YOU, THIS IS A MIRACLE IN A BOTTLE. She has not had ANY problems at all since I’ve been giving her this. 5 months so far, and she’s prefect! This stuff prevents the virus from shedding, therefore the symptoms are gone! 2 pumps a day is all she needs. She loves the taste of it, and gobbles it willingly, she’s almost looking forward every morning to her treat! I’ve searched the internet, this is the BEST DEAL as far as cost goes. It’s not expensive to give your cat what he/she needs! Buy it here!
Rating: 5 / 5
This stuff just works. One of my cats loves the taste, the other tolerates it – who can account for taste, especially cats’ taste? But Enisyl-F (L-Lysine) really speeds their recovery and that’s all that matters. At the first sign of sneezing, wheezing, coughing, or squinty eyes (for which I also use Terramycin ointment), I start feeding them a quarter inch of Enisyl-F twice a day and they’re feeling better in a few days. Also, the price offered through Entirely Pets via Amazon is great. Love the new larger dispensers too.
Rating: 5 / 5