“Supportive treatment is extremely important and can include appetite stimulants, nutrition, fluid therapy, effusion drainage (e.g. thoracocentesis if dyspnoeic), analgesics, anti-emetic and anti-pyretic drugs.” (As detailed here:https://www.abcdcatsvets.org/portfolio-item/factsheets-tools-for-feline-infectious-peritonitis-fip/)
Supplements and Diet
Anaemia and Vitamin B12 Supplementation
1) Give Vitamin B12 to anaemic cats. By doing so via injection or tablet form eg Cobalaplex. The FIP cat will feel better and less nauseous. Vitamin B12 also helps to reduce inflammation (FIP is an inflammatory process.)
Liver and Kidney Support
2) Give liver support in the form of a high quality product eg Denamarin, Samylin etc.
Both FIP and antivirals can be hard on the liver. By supporting the cat’s liver you give the cat a helping hand and it needs to work less to fight in an already very compromised body.
Give kidney support in the form of Aminavast. Please read the following
Probiotics
3) A good quality probiotic eg Prokolin Enterogenic can help restore gut health. FCoV originates in the gut and many FIP cats have a history of antibiotics causing bacterial imbalance, and some have histories of diarrhoea etc.
Food
4) A good quality diet high in protein, in wet form etc, e.g. Untamed, is also very beneficial to FIP cats to help restore nutrients lost during the disease known to be a process of starvation (no raw diet due to potential additional risks to immunocompromised FIP cats).
Oily fish etc is beneficial in providing healthy Omegas too.
Hills prescription diet a/d urgent care food is also a good food to start the very sick FIP cat with at the beginning to rebuild vital but lost vitamins, minerals etc.
Anti-Nausea and Appetite Stimulant
5) Anti-nausea and appetite stimulant Veterinary prescribed medications are highly recommended eg Mirtazapine in pill form or Mirataz as ear gel.
Nausea and inappetance are common issues with FIP cats in the early stages of diagnosis and treatment. To overcome these, simple medications can work wonders to get the cat feeling better and wanting to eat.
FIP is a disease of starvation. In Wet FIP cats it is common for them to be ravenous as their proteins are consumed by the effusions formed and they eat furiously to try to replenish these.
Vital FIP cat immune system strengthening using PI from Vetimmune
Section 3 here https://fipcatsuk.com/diagnosis-treatment-monitoring/
https://fipcatsuk.com/february-2024-uk-fip-cats-awareness-month-week-2/
And here for essential FCoV elimination https://fipcatsuk.com/february-2024-uk-fip-cats-awareness-month-week-3/