GS-441285 is primarily recognized for its antiviral properties, particularly in the treatment of feline infectious peritonitis (FIP), a previously fatal disease in cats. It functions as a nucleoside analog, inhibiting viral RNA replication, which makes it effective against certain RNA viruses. Beyond veterinary medicine, its mechanism of action has sparked interest in its potential application against other RNA viruses in humans, including coronaviruses. Research is ongoing to explore its efficacy in broader antiviral therapies, though its use remains experimental and primarily focused on veterinary applications at this time.