zilucoplan sodium: clinical use

Prescribing considerations

• Restrict use to the licensed adult, anti-AChR antibody-positive generalised myasthenia gravis population as add-on therapy.
• Treatment should be supervised by clinicians experienced in neuromuscular disorders.
• Confirm meningococcal vaccination status before initiation.
• Provide the patient alert card and patient/carer guide, explaining that vaccination does not eliminate meningococcal infection risk.
• Review broader immunisation needs and counsel about prevention and prompt treatment of other Neisseria infections.

Contraindications and cautions

• Hypersensitivity to zilucoplan or an excipient
• Patient not currently vaccinated against Neisseria meningitidis
• Unresolved Neisseria meningitidis infection

Monitoring

• Maintain vigilance for meningococcal infection and assess suspected cases immediately.
• Keep meningococcal vaccination status current throughout treatment.
• Be aware of possible transient amylase, lipase or eosinophil increases and potential morphoea during longer exposure.
• Assess clinical response and monitor closely if treatment is interrupted or stopped because myasthenia symptoms may recur.
• Evidence is unavailable in patients requiring dialysis, severe hepatic impairment, children and patients with MGFA Class V disease.

Clinical pharmacology

A highly protein-bound synthetic macrocyclic peptide that inhibits C5 cleavage and obstructs C5b binding to C6, suppressing membrane attack complex formation. It is mainly degraded through peptide catabolism rather than major CYP metabolism.

Formulation and product differences

• The UK range uses single-use, colour-coded pre-filled glass syringes with an automatic needle-safety device.
• The selected presentation has a rubine-red plunger; the solution should be clear to slightly opalescent, colourless and free of visible particles.
• The product is essentially sodium-free and must be protected from light and freezing.

Injection

Route: Parenteral

Strengths: 16.6 mg, 23 mg, 32.4 mg