Romidepsin (Istodax)

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General information

Class/mechanism: Histone deacetylase (HDAC) inhibitor. HDACs normally catalyze removal of acetyl groups from acetylated lysine residues in histones and non-histone proteins, which helps to regulate gene expression. Inhibition of histone deacetylases results in hyperacetylation of histones and modulates gene expression by creating an open chromatin state that leads to expression of previously silenced genes. Although the mechanism of action is not fully understood, inhibiting HDACs has been observed to result in cell cycle arrest and apoptosis of cancer cells.[1][2]
Route: IV
Extravasation: no information

For conciseness and simplicity, currently will focus on treatment regimens and not list information such as: renal/hepatic dose adjustments, metabolism (including CYP450), excretion, monitoring parameters (although this will be considered for checklists), or manufacturer. Instead, for the most current information, please refer to your preferred pharmacopeias such as Micromedex, Lexicomp, UpToDate (courtesy of Lexicomp), or the prescribing information.[1]

Diseases for which it is used

Patient drug information

History of changes in FDA indication

Also known as

  • Code names: FK228, FR901228, NSC 630176
  • Generic name: depsipeptide
  • Brand name: Istodax


  1. 1.0 1.1 1.2 Romidepsin (Istodax) package insert
  2. Romidepsin (Istodax) package insert (locally hosted backup)
  3. Romidepsin (Istodax) patient drug information (UpToDate)