Enzalutamide (Xtandi®)

SELF ADMINISTRATION - ORAL

Indications for Prior Authorization:

  • Metastatic castration-resistant prostate cancer

Patients must meet the following criteria for the indication(s) above:

  • Must have prior treatment with docetaxel
  • Must have had surgical castration with disease progression

The Following Conditions Do Not Meet the Criteria for Use as Established by the WHA P&T Committee:

  • All non-FDA approved uses not listed in the approved indications
  • Drug is not indicated for use in women

Dosing:

  • 160 mg orally once daily
  • Avoid co-administration with a strong CYP2C8 inhibitor
  • If drug cannot be avoided reduce dose to 80 mg PO daily

Warnings:

  • Enzalutamide is a strong enzyme inducer, CYP3A4, CYP2C9, CYP2C19. Will reduce plasma concentrations of drug such as warfarin and omeprazole.
  • Seizure risk 0.9% in clinical trial

Approval:

6 months


 

Last review date: December 2, 2013

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