Alcaftadine C₁₉H₂₁N₃O

Active ingredient description

Alcaftadine is an H1 histamine receptor antagonist and inhibitor of the release of histamine from mast cells. Decreased chemotaxis and inhibition of eosinophil activation has also been demonstrated.

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
S Sensory organs → S01 Ophthalmologicals → S01G Decongestants and antiallergics → S01GX Other antiallergics
Discover more medicines within S01GX11

Product monographs

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

Information Source
Document Type
FDA, National Drug Code (US)
Structured Product Labeling (SPL/PLR)

Structural formula

Graphic representation of the active ingredient's molecular structure

Chemical formula: C₁₉H₂₁N₃O
Molecular mass: 307.39 g/mol

External identifiers

CAS Substance: 147084-10-4
DrugBank Drug: DB06766
KEGG Drug: D06552
PubChem Compound: 19371515
RxNorm Ingredient: 1000082
SNOMED-CT Concept: 447208001
Alcaftadine (substance)
UNII Identifier: 7Z8O94ECSX


Alcaftadine is an active ingredient of these brands:

United States (US)

Brazil (BR)

Ecuador (EC)

Mexico (MX)

Singapore (SG)

Turkey (TR)

While we strive to include the brand names of medicines across all countries, our index remains incomplete. Therefore, it is possible that this medicine may also be marketed under different names in other countries.

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