Mepolizumab

Mepolizumab, sold under the brand name Nucala by GlaxoSmithKline, is a humanized monoclonal antibody used for the treatment of severe eosinophilic asthma, eosinophilic granulomatosis, and hypereosinophilic syndrome (HES). It recognizes and blocks interleukin-5 (IL-5), a signalling protein of the immune system.

Mepolizumab
Monoclonal antibody
TypeWhole antibody
SourceHumanized (from mouse)
TargetIL-5
Clinical data
Trade namesNucala
AHFS/Drugs.comMonograph
MedlinePlusa615058
License data
Pregnancy
category
  • AU: B1
Routes of
administration
Subcutaneous injection
ATC code
Legal status
Legal status
  • AU: S4 (Prescription only)
  • US: ℞-only
  • EU: Rx-only
Pharmacokinetic data
Bioavailability80% (estimate)
Protein bindingNone
MetabolismProteolytic enzymes
Elimination half-life20 (16–22) days
Identifiers
CAS Number
DrugBank
ChemSpider
  • None
UNII
KEGG
Chemical and physical data
Molar mass149 kDa
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The most common side effects include headache, injection site reactions, and back pain.

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