SB-559448 is a small-molecule drug that mimics the activity of thrombopoietin (TPO), a protein factor that promotes growth and production of blood platelets. This drug is developed by GlaxoSmithKline and used to treat Thrombocytopenia.Thrombocytopenia (decreased platelet count) is a common side effect of many chemotherapies and can lead to uncontrolled bleeding, thus representing a significant problem in the treatment of cancer patients.

Synonyms: SB-559448