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Selective oestrogen receptor degrader (SERD)

Fulvestrant

Brand names: Faslodex

Adult dose

Dose: 500mg IM (250mg into each buttock) on days 1, 15, 29, then monthly
Route: IM
Frequency: monthly

Clinical pearls

  • Postmenopausal ER+ HER2- advanced/metastatic breast cancer
  • Caution with anticoagulation — risk of haematoma at IM site

Contraindications

  • Pregnancy/breastfeeding
  • Severe hepatic impairment
  • Bleeding disorders/anticoagulation (caution with IM)

Side effects

  • Injection site reactions
  • Hot flushes
  • Nausea
  • Hepatotoxicity
  • Thromboembolism

Monitoring

  • LFTs

Reference: BNF; NICE TA503/TA836; https://bnf.nice.org.uk/drugs/fulvestrant/. Verify against your local formulary and the latest BNF before prescribing.

Related

Curated clinical cross-links plus same-class fallbacks.