Foscarnet trilithium salt, a pharmaceutical compound, has gained significant attention in medical research. Known for its antiviral properties, this medication is often used to treat viral infections such as cytomegalovirus (CMV) retinitis in patients with weakened immune systems. Although there are no direct synonyms for foscarnet trilithium salt, it can be referred to as an antiviral drug or an antiviral treatment. Additionally, it is classified as a nucleoside analogue, a subset of antiviral medications that act by interfering with the replication of viral DNA. Its unique mechanism of action makes it a valuable resource in combating viral infections, particularly when resistant strains of viruses emerge.