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HER2/EGFR tyrosine-kinase inhibitor

Lapatinib (Specialist drug)

Brand names: Tyverb

Adult dose

Dose: Specialist initiation only — refer to BNF/SmPC
Route: PO
Frequency: OD

Clinical pearls

  • HER2-positive metastatic breast cancer
  • Take on empty stomach

Contraindications

  • Severe hepatic impairment
  • Pregnancy

Side effects

  • Diarrhoea
  • Hand-foot skin reaction
  • Hepatotoxicity
  • Cardiotoxicity (LV dysfunction)
  • ILD
  • QT prolongation

Interactions

  • Strong CYP3A4 modulators
  • QT-prolonging drugs
  • Drugs raising gastric pH

Monitoring

  • LFTs
  • ECG
  • Echo (LVEF)

Reference: BNF; NICE TA257; SmPC; https://bnf.nice.org.uk/drugs/lapatinib-specialist-drug/. Verify against your local formulary and the latest BNF before prescribing.

Related

Curated clinical cross-links plus same-class fallbacks.