Belinostat (trade name Beleodaq, previously known as PXD101) is a histone deacetylase inhibitor drug developed by TopoTarget for the treatment of hematological malignancies and solid tumors. It was approved in July 2014 by the US FDA to treat peripheral T-cell lymphoma. The approved pharmaceutical formulation is given intravenously. Belinostat is primarily metabolized by UGT1A1; the initial dose should be reduced if the recipient is known to be homozygous for the UGT1A1*28 allele.