Samarium-153 (Quadramet)

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General information

Class/mechanism: Radioactive pharmaceutical agent (Samarium-153) that concentrates in areas of bone turnover associated with hydroxyapatite and releases beta and gamma radiation. Samarium-153 accumulates in osteoblastic lesions about 5 times as much as normal bone. Samarium-153's half-life is 46.3 hours.[1][2][3][4][5]
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

  • 1997-03-28: Initial approval for relief of pain in patients with confirmed osteoblastic metastatic bone lesions that enhance on radionuclide bone scan.

History of changes in EMA indication

  • 1998-02-04: Initial authorization

Also known as

  • Generic names: 153-Sm-EDTMP, 153Sm-ethylenediaminetetramethylenephosphonate (EDTMP), lexidronam pentasodium, samarium [153 SM], samarium Sm 153 lexidronam injection
  • Brand name: Quadramet