Bendamustine
Alkylating agents
Alkylating agentsHigh alert
An error with this medicine can cause serious harm: double checks and protocols are used.
A nitrogen mustard with a purine-like ring, given intravenously for chronic lymphocytic leukaemia and indolent B-cell lymphoma.
Also called: bendamustine hydrochloride
Quick facts
- Group
- Alkylating agents
- Target
- DNA, cross-linked between strands
- Used for
- Chronic lymphocytic leukaemia
- Key effects
- Lymphopenia · Nausea · Fatigue
- Monitor
- Blood counts · Temperature and signs of infection
- ATC
- L01AA09
No doses: the clinician sets them by the current guideline.
Mechanism of action
Bendamustine is a bifunctional derivative of mechlorethamine with a benzimidazole ring that resembles a purine. Its two chloroethyl arms form reactive groups that bond covalently to DNA and create cross-links between the strands, which trigger cell death through several pathways. It acts on both resting and dividing cells.
- The chloroethyl arms form reactive groups
- They bond to DNA and cross-link the two strands
- Resting and dividing lymphoma cells die
Indications
- Chronic lymphocytic leukaemia. Chronic lymphocytic leukaemia →
- Indolent B-cell non-Hodgkin lymphoma that progressed during or soon after a rituximab-containing regimen. Non-Hodgkin lymphoma →
Adverse effects
Common
- Lymphopenia, neutropenia, anaemia, thrombocytopenia
- Nausea, vomiting, diarrhoea
- Fatigue, fever
- Rash
Contraindications
- Known hypersensitivity to bendamustine or to the product's excipients
Key interactions
- CYP1A2 inhibitors
- Higher bendamustine levels and more adverse reactions.
- CYP1A2 inducers
- Lower levels and possibly less effect.
What is monitored
- Blood counts (neutrophils and platelets) before each cycle
- Temperature and signs of infection
- Skin at every visit
- Uric acid, potassium and creatinine early in treatment (tumour lysis)
Administration and safety
- The infusion site is watched during and after the infusion because of extravasation injury.
- Patients with milder infusion reactions are premedicated in later cycles.
- Hazardous drug: chemotherapy handling precautions.
Pregnancy and breastfeeding
Can cause fetal harm; effective contraception is advised.
Nursing care
- Watch for fever, chills or rash during and after each infusion.
- Check the infusion site for redness, swelling or pain.
- Report new confusion, weakness or vision changes (progressive multifocal leukoencephalopathy).
- Teaching: report fever, sores or blistering rash promptly.
Pharmacokinetics
- Absorption
- Intravenous infusion.
- Metabolism
- Mainly hydrolysis; CYP1A2 forms minor active metabolites.
Test yourself
Think of the answer, then tap the question to see it.
Which part of bendamustine's structure resembles a purine?
Its benzimidazole ring.
Which diseases is bendamustine mainly used for?
Chronic lymphocytic leukaemia and indolent B-cell non-Hodgkin lymphoma.
Which liver enzyme interaction can raise bendamustine levels?
Inhibition of CYP1A2.
Connections
← Back to the class: Alkylating agents
Educational content on how drugs work; not a prescribing guide and no substitute for a health professional's advice. No doses are given.
Sources: DailyMed - BENDAMUSTINE HYDROCHLORIDE injection, solution (DailyMed (U.S. National Library of Medicine), 2026); Bendamustine Injection: MedlinePlus Drug Information (MedlinePlus (U.S. National Library of Medicine), 2026); ATCDDD - ATC/DDD Index (WHO Collaborating Centre for Drug Statistics Methodology, 2026); eEML - Electronic Essential Medicines List (World Health Organization, 2025).
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Representative model, for educational purposes only.