Hello,
Feline Infectious Peritonitis (FIP) nosodes are available, The recommended dose is to give twice a day for the first 3 days, then give once every seven days for 4 weeks, then once every 30 days for six months.
Should your cat already have FIP, Baptisia 3c, 6c or 30c, dosed 3-4 times daily for 2-3 days, repeated as needed may also be helpful..
Fluids to prevent dehydration and a good organic diet are also helpful.
Best Wishes,
Dr. Carol Osborne, DVM
The only I found was this..
http://elixirs.com/products.cfm?productcode=col116