Donanemab (Anti-Amyloid Monoclonal Antibody)
Brand names: Kisunla
Donanemab is an anti-amyloid monoclonal antibody used in early symptomatic Alzheimer's disease to slow clinical progression by reducing cerebral amyloid plaque.
Adult dose
Dose auto-extracted from 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
- Known serious hypersensitivity to donanemab-azbt or to any of the excipients - reactions have included anaphylaxis
Side effects
- ARIA-E (amyloid related imaging abnormalities with oedema) - most common adverse reaction, at least 10% and higher incidence than placebo
- ARIA-H microhaemorrhage - most common adverse reaction, at least 10% and higher incidence than placebo
- ARIA-H superficial siderosis - most common adverse reaction, at least 10% and higher incidence than placebo
- Headache - most common adverse reaction, at least 10% and higher incidence than placebo
- Infusion-related reactions - the infusion rate may be reduced or the infusion discontinued, and pre-treatment with antihistamines, paracetamol/acetaminophen or corticosteroids may be considered prior to subsequent dosing
- Hypersensitivity reactions including anaphylaxis
Clinical monograph
How it works
It is a monoclonal antibody that binds to deposited amyloid-beta plaque and promotes its clearance, lowering the cerebral amyloid burden.
Prescribing in practice
- Amyloid-related imaging abnormalities (ARIA), comprising cerebral oedema and microhaemorrhage, are the key risk and require baseline and scheduled MRI surveillance, with caution in carriers of the ApoE e4 genotype.
- Confirmation of amyloid pathology and exclusion of contraindications such as significant prior haemorrhage are needed before starting, with treatment given by infusion under specialist supervision.
- Concurrent antithrombotic or anticoagulant therapy may increase the risk of haemorrhagic complications and should be carefully assessed.
Monitoring
Regular MRI monitoring for ARIA, alongside review for infusion reactions and cognitive response, is integral to treatment.
Counselling the patient
- You will need regular brain scans to check for swelling or small bleeds.
- Report any new headache, confusion, dizziness or visual changes promptly.
- Treatment aims to slow progression rather than reverse the condition.
Evidence & guidelines
Phase 3 trial evidence shows donanemab reduces amyloid plaque and modestly slows clinical decline in early Alzheimer's disease.
Reference: Sims et al. NEJM 2023 (TRAILBLAZER-ALZ 2); FDA Prescribing Information Kisunla 2024; Alzheimer's Association 2024 guidelines; 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.
- Modified Mallampati Classification · Airway Assessment
- Modified Early Warning Score (MEWS) · Early Warning
- Modified Shock Index (MSI) · Haemodynamic Assessment
- Modified Sgarbossa's Criteria (Smith Modification) for MI in LBBB · ECG Interpretation
- Gillmore Staging System for Transthyretin Amyloid Cardiomyopathy (ATTR-CM) · Cardiomyopathy
- Grogan Staging System for Transthyretin Amyloid Cardiomyopathy (ATTR-CM) · Cardiomyopathy
- Falls Assessment in Older Adults · NICE CG161 2013
- Delirium Outside ICU · NICE CG103
- Comprehensive Geriatric Assessment (CGA) · BGS / NICE
- Delirium Assessment and Management · NICE CG103 2010
- Frailty Recognition and Management · BGS Frailty Framework / NHS NHSE
- Polypharmacy and Medicines Optimisation · STOPP/START v2 2014 / NICE NG5