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ATC S01GX08 · Other Antiallergics · updated 4 Nov 2026

Ketotifen shortage

As of 4 Nov 2026, Ketotifen has a reported shortage in 6 of the 16 countries we track (Canada, Spain, Austria, Czechia, Norway, Sweden), covering 10 products from 3 companies.

Is there a Ketotifen shortage?

Yes. As of 4 Nov 2026, Ketotifen is reported short in 6 of the 16 countries we track: Canada, Spain, Austria, Czechia, Norway, Sweden. The earliest expected return is 14 Nov 2026 (Spain).

Countries6/16
Products10packs or presentations
Companies30 listed
Short since11 Feb 202521 months ago
Earliest return14 Nov 2026company estimate
Main reasonManufacturing problem
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United StatesNo reported shortageCanada1 product shortGermanyNo reported shortageFranceNo reported shortageItalyNo reported shortageSpain2 products shortIrelandNo reported shortageAustria2 products shortBelgiumNo reported shortageSwitzerlandNo reported shortageCzechia1 product shortNorway3 products shortSweden1 product shortJapanNo reported shortageNew ZealandNo reported shortageAustraliaNo reported shortage

How the shortage spread

All cross-border shortages

Countries in the order the shortage started there (earliest start date of a product still short). First reported in Norway on 11 Feb 2025; most recently in Sweden on 13 Aug 2026.

Not on the official list in: United States, Germany, France, Italy, Ireland, Belgium, Switzerland, Japan, New Zealand, Australia.

Timeline

CanadaSpainAustriaCzechiaNorwaySweden
20262027ZADITOR (5ML)ZADITOR (5ML)BENTIFEN 0,25mg/ml COLIRIO EN SOLUCION , 1 fBENTIFEN 0,25mg/ml COLIRIO EN SOLUCION , 1 frasco de 5 mlZADITEN 0,25 mg/ml COLIRIO EN SOLUCION , 1 fZADITEN 0,25 mg/ml COLIRIO EN SOLUCION , 1 frasco de 5 mlZaditen 0,025% - Augentropfen, 5 mlZaditen 0,025% - Augentropfen, 5 mlZaditen konservierungsmittelfrei 0,025% - AuZaditen konservierungsmittelfrei 0,025% - Augentropfen in Einzeldosisbehältnissen, 20 StückZADITEN SDU 0,25MG/ML 0,25MG/ML OPH GTT SOL ZADITEN SDU 0,25MG/ML 0,25MG/ML OPH GTT SOL MDC 30X0,4ML IIZaditen 0,25 mg/ml øyedråper, oppløsning, 5 Zaditen 0,25 mg/ml øyedråper, oppløsning, 5 ml flaske av plast med dråpespissZaditen 0,25 mg/ml øyedråper, oppløsning i eZaditen 0,25 mg/ml øyedråper, oppløsning i endosebeholder, 20x0,4 ml endosepipetteZaditen 0,25 mg/ml øyedråper, oppløsning i eZaditen 0,25 mg/ml øyedråper, oppløsning i endosebeholder, 60x0.4 ml endosepipetteZaditen 0,25 mg/ml Plastflaska, 5 mlZaditen 0,25 mg/ml Plastflaska, 5 mltoday

Solid bars run from the reported start to today; faded bars show the time left until the expected return. An arrow means no return date was given.

Which companies are short

products short, all countries
Thea6Th A3Thea Clermont-Ferrand1

Compared with similar medicines

ATC group S01GX · Other Antiallergics
Ketotifen6/16Azelastine3/16Bilastine3/16Levocabastine2/16Olopatadine2/16Cromoglicic Acid, Combinations1/16Epinastine1/16Spaglumic Acid1/16

Affected products

CountryProductCompanySinceExpected backReason
CAZADITOR (5ML)LABORATOIRES THEA14 Jul 20261 Feb 2027Manufacturing problem
Disruption of the manufacture of the drug
ESBENTIFEN 0,25mg/ml COLIRIO EN SOLUCION , 1 frasco de 5 mlLaboratoires Thea20 May 202514 Nov 2026Not stated
ESZADITEN 0,25 mg/ml COLIRIO EN SOLUCION , 1 frasco de 5 mlLaboratoires Thea12 Aug 202514 Nov 2026Not stated
ATZaditen 0,025% - Augentropfen, 5 mlLaboratoires Thea16 Jul 202531 Jan 2027Quality problem or recall
Rückruf von Chargen am Markt
ATZaditen konservierungsmittelfrei 0,025% - Augentropfen in Einzeldosisbehältnissen, 20 StückLaboratoires Thea16 Mar 202631 Jan 2027Manufacturing problem
Kapazitätsengpässe bei der Herstellung
CZZADITEN SDU 0,25MG/ML 0,25MG/ML OPH GTT SOL MDC 30X0,4ML IILaboratoires Thea, Clermont-Ferrand17 Feb 202616 Nov 2026Manufacturing problem
Výrobní důvody
NOZaditen 0,25 mg/ml øyedråper, oppløsning, 5 ml flaske av plast med dråpespissLaboratoires Théa S.A.S11 Feb 20251 Feb 2027Manufacturing problem
Produksjonsproblemer
NOZaditen 0,25 mg/ml øyedråper, oppløsning i endosebeholder, 20x0,4 ml endosepipetteLaboratoires Théa S.A.S27 Apr 202628 Dec 2026Manufacturing problem
Produksjonsproblemer
NOZaditen 0,25 mg/ml øyedråper, oppløsning i endosebeholder, 60x0.4 ml endosepipetteLaboratoires Théa S.A.S8 Aug 202628 Dec 2026Manufacturing problem
Produksjonsproblemer
SEZaditen 0,25 mg/ml Plastflaska, 5 mlLaboratoires THEA13 Aug 202629 Jan 2027Not stated

"Expected back" is the date the company gave the authority, when it gave one. Ask a pharmacist about alternatives.

Questions

Is there a Ketotifen shortage?

Yes. As of 4 Nov 2026, Ketotifen is reported short in 6 of the 16 countries we track: Canada, Spain, Austria, Czechia, Norway, Sweden. The earliest expected return is 14 Nov 2026 (Spain).

When will Ketotifen be back in stock?

Companies expect supply back from 14 Nov 2026 in Spain; Canada: 1 Feb 2027; Spain: 14 Nov 2026; Austria: 31 Jan 2027; Czechia: 16 Nov 2026; Norway: 28 Dec 2026; Sweden: 29 Jan 2027. These are company estimates reported to each authority.

Why is Ketotifen in short supply?

The most common reason reported is: manufacturing problem. Reasons by product are listed in the table below.

Which companies have Ketotifen shortages?

Thea, Th A, Thea Clermont-Ferrand.