Metamizole sodium

Chemical formula: C₁₃H₁₆N₃NaO₄S  Molecular mass: 311.36 g/mol  PubChem compound: 522325

Active ingredient description

Metamizole sodium is a pyrazolone derivative with analgesic, antipyretic and slight antiinflammatory and spasmolytic properties. It has the most potent analgesic effect of all the pyrazolone derivatives. As with other analgesics, its mechanism of action has not been elucidated in detail. It includes inhibition of prostaglandin synthesis (PGE1 and PGE2) and reversible inhibition of platelet aggregation. It inhibits cyclo-oxygenase and influences the effect of arachidonic acid.

Medicine classification

This medicinal substance has been classified in the anatomical therapeutic chemical (ATC) classification according to its main therapeutic use as follows:

ATC code Group title Classification
N02BB02 Metamizole sodium N Nervous system → N02 Analgesics → N02B Other analgesics and antipyretics → N02BB Pyrazolones
Discover more medicines within N02BB02

Product monographs

Competent medicine agencies globally have authorized commercialization of this active ingredient according to these medication package inserts (MPIs):

Title Information Source Document Type  
METAMIZOLE SODIUM Oral drops, solution European Medicines Agency (EU) MPI, EU: SmPC

Structural formula

Graphic representation of the active ingredient's molecular structure

External identifiers

CAS Substance: 68-89-3
DrugBank Drug: DB04817
KEGG Drug: D08188
PubChem Compound: 522325
RxNorm Ingredient: 1537943
SNOMED-CT Concept: 22165008
Metamizole sodium (substance)
UNII Identifier: VSU62Z74ON
METAMIZOLE SODIUM

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