Tarlatamab (Specialist drug)
Brand names: Imdelltra
Tarlatamab is a bispecific T-cell-engaging antibody used in adults with advanced small-cell lung cancer that has progressed after prior chemotherapy.
Adult dose
Dose adjustments
Based on population pharmacokinetic analyses, no dose adjustment is required in patients with mild or moderate renal impairment; tarlatamab has not been studied in patients with severe renal impairment (§4.2).
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 to any of the excipients (§4.3)
Side effects
- Cytokine release syndrome (56.7%)
- Decreased appetite (36.4%)
- Pyrexia (31.9%)
- Dysgeusia (31.3%)
- Constipation (30.4%)
- Anaemia (30.0%)
- Fatigue (29.8%)
Clinical monograph
How it works
It binds DLL3 on small-cell lung cancer cells and CD3 on T cells, bringing the two together so that T cells are activated to destroy the tumour cells.
Prescribing in practice
- Cytokine release syndrome and neurological toxicity (including ICANS) can be serious, so the first doses are given with a step-up schedule and close monitoring in an appropriate care setting.
- Patients should be monitored for an adequate period after early doses and counselled not to drive if neurological symptoms are possible.
- Infections, cytopenias and infusion-associated reactions can occur.
Monitoring
Monitor closely for cytokine release syndrome and neurological symptoms, especially during and after the initial step-up doses, alongside blood counts and signs of infection.
Counselling the patient
- Seek urgent help for fever, dizziness, confusion, or new weakness or difficulty speaking.
- Arrange to stay close to the treatment centre and avoid driving during the early monitoring period as advised.
- Report signs of infection promptly.
Evidence & guidelines
Efficacy in previously treated small-cell lung cancer was shown in a dedicated registrational trial.
Reference: 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).
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