Horizon Therapeutics (formerly known as Horizon Pharma) is a biopharmaceutical company focused on researching, developing, and commercializing medicines. It offers products to treat rare, autoimmune, and inflammatory diseases. Its products include TEPEZZA, KRYSTEXXA, RAVICTI, PROCYSBI, UPLIZNA, ACTIMMUNE, etc. The company also provides patient advocacy, disease education, and patient support programs.