My cat had FIP and because the treatment isn't medically approved, my vet couldn't even really talk about it, let alone prescribe a treatment, since it could put her license at risk. But she gave me enough hints so that I could do my own research.
There are groups out there that help cats with FIP. I was able to get the needed medication and treat my cat. It's been 6 months now since he's been cured and I'm so happy I was able to save his life.
The medication is called GS-441524 and is similar to Remdesivir. Gilead refuses to get GS-44 certified for vet use because it's so close to Remdesivir that humans could use it to treat COVID at a lower cost. Fuck big pharma and their greed.
So good to hear that you could save your cat! I have also treated two cats for FIP with GS-441524: my own cat, who was diagnosed with dry FIP in September 2020 and who is now an almost 5 year old healthy cat and a stray cat that was diagnosed with neurological FIP in August 2021 and has also been healthy and happy for a long time :)
It's a shame that the treatment is still not approved due to the patent issues, but at least in the German-speaking world, an increasing number of vets have learned about the treatment and have a positive attitude about it. While they can't officially prescribe or administer the drug, mentioning the drug shouldn't be an issue because they could even refer to the ongoing studies at LMU Munich.
I'm glad that you were able to save those 2 cats! My little Potato was 7 months old when he was diagnosed and it was pretty bad. It was either I get him the treatment or he would need to get euthanized. I had just recently lost my 13 year old cat and could not go through another loss so soon. I'm really glad that I helped him.
Yes, each time I think about what the alternative outcome for the two kitties would have been, I become sentimental :')
I am happy that you could save your cat as well! While the success rate is not 100%, it seems to be somewhere around 80% under the less-than-optimal conditions with black market and some vets opposing the treatment (I used to do the statistics for one German group that has assisted the treatment of around 3000 cats since 2020, so if anyone's interested, I'm happy to share data!).
In my opinion, those odds mean that it's always definitely worth a shot! I personally would have even tried it for my own cats if the odds were 50/50 or lower. He was diagnosed just before his second birthday and I'm so glad that he's fully recovered and has led a completely normal life since.