ATC B03BA05 · Vitamin B12 (Cyanocobalamin and Analogues) · updated 2 Nov 2026
Mecobalamin shortage
As of 2 Nov 2026, Mecobalamin has a reported shortage in 1 of the 16 countries we track (Japan), covering 2 products from 2 companies.
Is there a Mecobalamin shortage?
Yes. As of 2 Nov 2026, Mecobalamin is reported short in 1 of the 16 countries we track: Japan. No company has given a return date.
Timeline
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 countriesListed: Eisai 4523 · Tokyo
Compared with similar medicines
ATC group B03BA · Vitamin B12 (Cyanocobalamin and Analogues)Affected products
| Country | Product | Company | Since | Expected back | Reason |
|---|---|---|---|---|---|
| JP | メコバラミン錠500μg「TCK」 | Tatsumi Kagaku | 16 Oct 2024 | not given | Manufacturing problem |
| JP | ロゼバラミン筋注用25mg limited | Eisai | 19 Feb 2025 | not given | Other |
"Expected back" is the date the company gave the authority, when it gave one. Ask a pharmacist about alternatives.
Questions
Is there a Mecobalamin shortage?
Yes. As of 2 Nov 2026, Mecobalamin is reported short in 1 of the 16 countries we track: Japan. No company has given a return date.
When will Mecobalamin be back in stock?
No return date has been given; Japan: no date given. These are company estimates reported to each authority.
Why is Mecobalamin in short supply?
The most common reason reported is: manufacturing problem. Reasons by product are listed in the table below.
Which companies have Mecobalamin shortages?
Tatsumi Kagaku, Eisai.