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ATC S01AD03 · Antivirals · updated 4 Nov 2026

Aciclovir shortage

As of 4 Nov 2026, Aciclovir has a reported shortage in 2 of the 16 countries we track (Spain, Japan), covering 5 products from 4 companies.

Is there an Aciclovir shortage?

Yes. As of 4 Nov 2026, Aciclovir is reported short in 2 of the 16 countries we track: Spain, Japan. No company has given a return date. New since 5 Oct 2026: Japan.

Countries2/16
Products5packs or presentations
Companies42 listed
Short since24 Aug 20233.2 years ago
Earliest returnnot givencompany estimate
Main reasonOther
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United StatesNo reported shortageCanadaNo reported shortageGermanyNo reported shortageFranceNo reported shortageItalyNo reported shortageSpain1 product shortIrelandNo reported shortageAustriaNo reported shortageBelgiumNo reported shortageSwitzerlandNo reported shortageCzechiaNo reported shortageNorwayNo reported shortageSwedenNo reported shortageJapan4 products shortNew 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 Spain on 24 Aug 2023; most recently in Japan on 6 Mar 2024.

Not on the official list in: United States, Canada, Germany, France, Italy, Ireland, Austria, Belgium, Switzerland, Czechia, Norway, Sweden, New Zealand, Australia.

Timeline

SpainJapan
202420252026XOROX 30 MG/G POMADA OFTALMICA, 1 tubo de 4.XOROX 30 MG/G POMADA OFTALMICA, 1 tubo de 4.5 gゾビラックス軟膏5%ゾビラックス軟膏5%アシクロビル顆粒40%「タカタ」アシクロビル顆粒40%「タカタ」アシクロビルシロップ8%「タカタ」アシクロビルシロップ8%「タカタ」アシクロビル錠200mg「トーワ」アシクロビル錠200mg「トーワ」today

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
Takata Pharmaceutical2Agepha S.R.O.1GSK1 GSKTowa (Pensa)1 4553

Listed: GSK GSK · LSE, Towa (Pensa) 4553 · Tokyo

Compared with similar medicines

ATC group S01AD · Antivirals
Aciclovir2/16Famciclovir1/16Ganciclovir1/16Trifluridine1/16

Affected products

CountryProductCompanySinceExpected backReason
ESXOROX 30 MG/G POMADA OFTALMICA, 1 tubo de 4.5 gAgepha Pharma S.R.O.24 Aug 2023not givenNot stated
ゾビラックス軟膏5%GSK6 Mar 2024not givenQuality problem or recall
Quality problem
アシクロビル顆粒40%「タカタ」Takata Pharmaceutical7 Nov 2025not givenOther
アシクロビルシロップ8%「タカタ」 limitedTakata Pharmaceutical15 Jan 2026not givenOther
アシクロビル錠200mg「トーワ」 limitedTowa (Pensa)22 Oct 2026not givenIncreased demand

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

Questions

Is there an Aciclovir shortage?

Yes. As of 4 Nov 2026, Aciclovir is reported short in 2 of the 16 countries we track: Spain, Japan. No company has given a return date. New since 5 Oct 2026: Japan.

When will Aciclovir be back in stock?

No return date has been given; Spain: no date given; Japan: no date given. These are company estimates reported to each authority.

Why is Aciclovir in short supply?

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

Which companies have Aciclovir shortages?

Takata Pharmaceutical, Agepha S.R.O., GSK, Towa (Pensa).