Independent register of U.S. FDA drug recalls · updated Oct 10, 2026
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Class II · Moderate risk Ongoing Initiated Oct 23, 2020 (6 years ago)

Metformin Hydrochloride Extended-Release Tablets

Class II — Moderate risk. May cause temporary or reversible harm; serious harm unlikely.

Why it was recalled

CGMP Deviations: detection of N-Nitrosodimethylamine (NDMA) impurity above the acceptable intake level

Cause type: Nitrosamine impurity

Trace nitrosamine impurities such as NDMA, NDEA or NMBA found above the acceptable daily limit. Nitrosamines are probable human carcinogens that can form during manufacturing or storage. This is the cause behind the large valsartan, losartan and ranitidine (Zantac) recalls. All nitrosamine impurity recalls.

What was recalled

Metformin Hydrochloride Extended-Release Tablets, USP 500 mg, 100 count bottles, Rx Only. Manufactured by: Nostrum Laboratories, Inc. Kansas City, MO 64120. NDC 29033-055-01

Affected NDC 29033-0055-01

Compare with the code on your package — it is the most precise check available.

Drug: Metformin Category: Diabetes Medication

Recalling firm
Nostrum Laboratories Inc
NDC code
29033-055-01
Origin
MO, United States
Initiated by
Voluntary: Firm initiated
FDA recall number
D-0068-2021 · FDA notice

Check, then ask. Class II means harm is possible but usually temporary or reversible. Find the lot number on your package; if it matches, ask your pharmacist about a replacement. Do not simply stop a prescribed medication on your own - the gap can be riskier than the recall.

Other Metformin recalls

See all
Class II · Moderate risk

Synjardy XR Tablets

CGMP Deviations: An incorrect detergent was used and the required swab sampling was not performed on a production hopper that had previously been used for a different product.

Ongoing cGMP deviation Boehringer Ingelheim Pharmaceuticals, Inc. D-0657-2026

Other recalls by Nostrum Laboratories Inc

All 2020 recalls
Class II · Moderate risk

Sucralfate Tablets

CGMP Deviations: The recalling firm filed for Chapter 11 in September 2024. As a result, it cannot monitor the quality program and hence cannot assure that products meet the identity, strength, quality, and purity characteristics that they are purported or represented to possess, rendering the products adulterated.

Ongoing cGMP deviation Nostrum Laboratories, Inc. NDC 29033-0003-01 D-0547-2025