Maribavir
Maribavir is an inhibitor of the cytomegalovirus (CMV; HHV5) pUL97 kinase which is used to treat CMV infections in patients post-transplantation. Most standard CMV therapies, such as [ganciclovir] or [foscarnet], target CMV DNA polymerase - while generally effective, these medications tend to promote the development of CMV resistance to DNA polymerase-based therapies, and their use is often limited by toxicities like myelosuppression and renal injury. Maribavir is novel in that it instead targets the CMV pUL97 kinase, thereby providing an effective alternative treatment option in cases of resistant infections.  Maribavir was approved by the FDA in November 2021, under the name Livtencity (Takeda), for the treatment of resistant CMV infections in post-transplant patients. The drug was also approved by Health Canada in September 2022 and by European Commission in November 2022.