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Non-steroidal anti-androgen

Flutamide

Brand names: Drogenil

Adult dose

Dose: 250mg TDS
Route: PO
Frequency: TDS

Clinical pearls

  • Prostate cancer (less commonly used now; bicalutamide preferred)
  • Hepatotoxicity occurs early — check LFTs frequently in first 4 months

Contraindications

  • Severe hepatic impairment
  • Pregnancy/breastfeeding

Side effects

  • Hepatotoxicity (potentially fatal — black box)
  • Gynaecomastia
  • Diarrhoea
  • Photosensitivity
  • Methaemoglobinaemia

Interactions

  • Warfarin (raised INR)
  • CYP1A2 substrates

Monitoring

  • LFTs (monthly initially)

Reference: BNF; NICE NG131; https://bnf.nice.org.uk/drugs/flutamide/. Verify against your local formulary and the latest BNF before prescribing.

Related

Curated clinical cross-links plus same-class fallbacks.