Home / Respiratory system / Diphenhydramine
ATC R06AA02 · Aminoalkyl Ethers
Diphenhydramine shortage
As of 2 Nov 2026, Diphenhydramine has a reported shortage in 2 of the 15 countries we track (Canada, Sweden), covering 4 products from 3 companies.
Countries2/15
Products4packs or presentations
Companies30 listed
Short since11 Apr 201412.6 years ago
Earliest return31 Jan 2027company estimate
Main reasonManufacturing problem
United StatesNo reported shortageCanada3 products shortGermanyNo reported shortageFranceNo reported shortageItalyNo reported shortageSpainNo reported shortageIrelandNo reported shortageAustriaNo reported shortageBelgiumNo reported shortageSwitzerlandNo reported shortageCzechiaNo reported shortageNorwayNo reported shortageSweden1 product shortJapanNo reported shortageAustraliaNo reported shortage
Timeline
CanadaSweden
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 countriesCompared with similar medicines
ATC group R06AA · Aminoalkyl EthersAffected products
| Country | Product | Company | Since | Expected back | Reason |
|---|---|---|---|---|---|
| CA | NADRYL 50MG (100) | LABORATOIRE RIVA INC | 11 Apr 2014 | not given | Manufacturing problem Disruption of the manufacture of the drug |
| CA | UNISOM SLEEPGELS EXTRA STRENGTH (20 capsules) | PALADIN LABS INC. | 25 Oct 2023 | not given | Distribution or logistics Delay in shipping of the drug |
| CA | DIPHENIST (10 x 1 mL vial / fiole) anticipated | OMEGA LABORATORIES LIMITED | 15 Nov 2026 | 31 Jan 2027 | Manufacturing problem Disruption of the manufacture of the drug |
| SE | Desentol Flaska, 250 ml | 15 Sep 2026 | 15 Feb 2027 | Not stated |
"Expected back" is the date the company gave the authority, when it gave one. Ask a pharmacist about alternatives.