Drug reference
Eculizumab
Monoclonal Antibody · Immunosuppressant
Also known as Soliris
Monoclonal AntibodyImmunosuppressant
CDSCO approvedSchedule H
EXCRETION
—
not curated
INTERACTIONS
—
none in our sources
PREGNANCY
—
not curated
Mechanism
Eculizumab is a recombinant monoclonal antibody that inhibits terminal complement activation at the C5 protein. By blocking the cleavage of C5, it disrupts the lytic cascade, thereby reducing haemolysis and thrombotic microangiopathy.
Indications
Reduce haemolysis in paroxysmal nocturnal haemoglobinuria (PNH), in those with a history of blood transfusions (under expert supervision)Reduce thrombotic microangiopathy in atypical haemolytic uraemic syndrome (aHUS) (specialist use only)
Dosing
- Adult
- For PNH, by intravenous infusion: Initially 600 mg once weekly for 4 weeks, then increased to 900 mg once weekly for 1 week; maintenance 900 mg every 12–16 days. For aHUS, by intravenous infusion: Initially 900 mg once weekly for 4 weeks, then increased to 1.2 g once weekly for 1 week; maintenance 1.2 g every 12–16 days.
Contraindications
- Patients unvaccinated against Neisseria meningitidis
- Unresolved Neisseria meningitidis infection
Side effects
Serious
- Life-threatening meningococcal infections
Related guidelines
Blood transfusion in obstetrics and gynaecology
FOGSI · Obstetrics & Gynaecology · 2024
Acute coronary syndrome in chronic kidney disease
CSI · Cardiology · 2020
Empirical antimicrobial use in common syndromes
ICMR · Infectious Diseases · 2019
Primary PCI for acute coronary syndrome
ESC · Cardiology · 2026
Sjögren's syndrome
EULAR · Rheumatology · 2025
Other Monoclonal Antibody drugs
Ask House about Eculizumab
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Sources: Harrison 22e, Katzung, BNF, Nelson·Verified: 2026-05-10 · House clinical team