Eiger BioPharmaceuticals Inc is a commercial stage biopharmaceutical company focused on the development and commercialization of drugs for serious, rare, and ultra-rare diseases with high unmet medical needs and no approved therapies. Its program lonafarnib, a prenylation inhibitor, boosted with ritonavir, for the treatment of Hepatitis Delta Virus (HDV) infection, is in Phase 3 clinical development. Its product candidate pipeline includes Lonafarnib (LNF) in HDV, Peginterferon Lambda (lambda) in HDV, LNF in Progeria, and Progeroid Laminopathies (PL), Avexitide in Post-Bariatric Hypoglycemia (PBH), and Avexitide in Congenital Hyperinsulinism (CHI), all advancing toward Phase 3.