Belimumab

Belimumab, sold under the brand name Benlysta, is a human monoclonal antibody that inhibits B-cell activating factor (BAFF), also known as B-lymphocyte stimulator (BLyS). It is approved in the United States and Canada, and the European Union to treat systemic lupus erythematosus and lupus nephritis.

Belimumab
Fab fragment of belimumab. PDB: 5Y9K.
Monoclonal antibody
TypeWhole antibody
SourceHuman
TargetB-cell activating factor (BAFF, BLyS)
Clinical data
Trade namesBenlysta
Other namesLymphoStat-B
AHFS/Drugs.comMonograph
MedlinePlusa611027
License data
Pregnancy
category
  • AU: C
Routes of
administration
Intravenous, subcutaneous
ATC code
Legal status
Legal status
  • AU: S4 (Prescription only)
  • CA: ℞-only / Schedule D
  • US: ℞-only
  • EU: Rx-only
Identifiers
CAS Number
DrugBank
ChemSpider
  • none
UNII
KEGG
ChEMBL
Chemical and physical data
FormulaC6358H9904N1728O2010S44
Molar mass144121.90 g·mol−1
 NY (what is this?)  (verify)

The most common side effects include bacterial infections, such as bronchitis (infection in the lungs) and infection of the urinary tract (structures that produce or carry urine), diarrhea and nausea (feeling sick).

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