Ketotifen

from source

C19H19NOS · 309.4 g/mol

Ketotiphene

Also sold as Zaditor, Alaway from source

What is Ketotifen?

An antihistamine used mostly as an eye drop for itchy allergic eyes, sold as Zaditor and Alaway. Ketotifen (C19H19NOS, 309 g/mol) is an over-the-counter medicine sold over the counter. from source

CategoryOTC medicine

Chemical familyAromatics Ketones

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Fig. 1 · 2D structure RDKit

SMILESCN1CCC(=C2C3=C(C(=O)CC4=CC=CC=C42)SC=C3)CC1

Where you'll find it

Sold over the counter, without a prescription. Sold as Zaditor, Alaway. See the rest of the otc medicine group.

Toxicity & hazards

WarningIrritantH302from source

Keep roaming

Where Ketotifen leads

Sources & methodology

PubChem CID: 3827
Wikidata: Q2458673
Structure: PubChem → RDKit
Similar molecules: MoleculeFinder fingerprint similarity
Data refreshed: October 19, 2026

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