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Anti-VEGF monoclonal antibody (specialist) Pregnancy: Contraindicated in pregnancy (eMC §4.3/§4.6); IgGs cross the placenta and bevacizumab is suspected to cause serious birth defects. Women of childbearing potential must use effective contraception during and up to 6 months after treatment. Discontinue breast-feeding during therapy and for at least 6 months after the last dose.

Bevacizumab

Brand names: Avastin

Bevacizumab is a recombinant humanised monoclonal antibody and an anti-angiogenic agent used in the treatment of several advanced cancers and certain ophthalmic conditions.

Auto-extracted from the source labelling — not yet independently clinician-verified. These values were distilled from the UK SPC (or the US label where noted) but have not had a clinician sign-off. Confirm against the current SmPC before prescribing.

Adult dose

Dose: Indication-specific, 5-15 mg/kg body weight (e.g. metastatic colorectal cancer 5 mg/kg every 2 weeks or 7.5 mg/kg every 3 weeks)
Route: Intravenous infusion
Frequency: Every 2 weeks or every 3 weeks depending on indication and regimen
eMC §4.2 (Abevmy 25 mg/ml) — must be given under the supervision of a physician experienced in antineoplastic medicinal products; dose reduction for adverse reactions is not recommended (suspend or discontinue instead). Indication-specific dosing: Metastatic colorectal cancer (mCRC) 5 or 10 mg/kg every 2 weeks, or 7.5 or 15 mg/kg every 3 weeks. Metastatic breast cancer 10 mg/kg every 2 weeks or 15 mg/kg every 3 weeks. Non-squamous NSCLC 7.5 or 15 mg/kg every 3 weeks (with platinum-based chemo, up to 6 cycles then single agent); with erlotinib 15 mg/kg every 3 weeks. Metastatic renal cell cancer 10 mg/kg every 2 weeks. Epithelial ovarian/fallopian tube/primary peritoneal cancer 15 mg/kg every 3 weeks (front-line and platinum-sensitive recurrent), or 10 mg/kg every 2 weeks (platinum-resistant; 15 mg/kg every 3 weeks when combined with topotecan given days 1-5). Cervical cancer 15 mg/kg every 3 weeks. Continue until disease progression or unacceptable toxicity (front-line ovarian capped at max 15 months). Administration: initial dose over 90 minutes; if tolerated, second over 60 minutes, subsequent over 30 minutes. Not an IV push/bolus; do not mix with glucose solutions. Do not initiate for at least 28 days following major surgery or until the surgical wound is fully healed. No dose adjustment in patients >=65 years; safety/efficacy not studied in renal or hepatic impairment. US labelling (MVASI) also lists recurrent glioblastoma 10 mg/kg every 2 weeks.

Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.

Contraindications

  • Hypersensitivity to the active substance or any excipient
  • Hypersensitivity to Chinese Hamster Ovary (CHO) cell products or other recombinant human or humanised antibodies
  • Pregnancy

Side effects

  • Hypertension
  • Fatigue or asthenia
  • Diarrhoea
  • Abdominal pain
  • Serious: gastrointestinal perforations; haemorrhage (including pulmonary haemorrhage/haemoptysis); arterial thromboembolism

Interactions

  • No clinically meaningful effect on pharmacokinetics of irinotecan (or SN38), interferon-alfa, carboplatin or paclitaxel (US §7); however lower paclitaxel exposure was seen in some patients receiving paclitaxel + carboplatin with bevacizumab

Clinical monograph

How it works

It binds and neutralises vascular endothelial growth factor (VEGF-A), preventing it from activating its receptors and thereby inhibiting tumour angiogenesis.

Prescribing in practice

  • It increases the risk of gastrointestinal perforation, serious haemorrhage, arterial thromboembolism and impaired wound healing, so treatment is interrupted around surgery and stopped if these occur.
  • It is a specialist agent administered under oncology supervision, often in combination with chemotherapy.
  • Hypertension and proteinuria are common and may require monitoring and management; rare cases of reversible posterior leukoencephalopathy have been reported.

Monitoring

Monitor blood pressure and urinary protein regularly during treatment, and remain alert for bleeding, thrombosis or gastrointestinal symptoms.

Counselling the patient

  • Report severe abdominal pain, significant bleeding, chest pain or new neurological symptoms urgently.
  • Inform the team of any planned surgery or dental procedures as treatment may need to be paused.
  • Effective contraception is advised during and for a period after treatment.

Evidence & guidelines

Its efficacy across tumour types is established in randomised trials and reflected in NICE technology appraisals for selected indications.

Reference: multiple NICE TAs; ESMO; SmPC; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.