Independent register of U.S. FDA drug recalls · updated Oct 10, 2026
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Class II · Moderate risk Terminated Initiated Jun 5, 2020 (6 years ago)

metFORMIN HCL ER USP 500 mg

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

Why it was recalled

CGMP Deviations: FDA analysis detected 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 HCL ER USP 500 mg, a) 30 tablets (NDC: 43063-428-30); b) 60 tablets (NDC: 43063-428-60); c) 90 tablets (NDC: 43063-428-90); d) 120 tablets (NDC: 43063-428-98); e) 180 tablets (NDC: 43063-428-93); f) 500 tablets (NDC: 53746-0178-05), Rx only, PD-Rx Pharmaceuticals Incorporated Oklahoma City, OK 73127

Affected NDCs 43063-0428-30 43063-0428-60 43063-0428-90 43063-0428-93 43063-0428-98 53746-0178-05

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

Drug: Metformin Category: Diabetes Medication

Recalling firm
PD-Rx Pharmaceuticals, Inc.
Origin
OK, United States
Initiated by
Voluntary: Firm initiated
FDA recall number
D-1307-2020 · 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. This recall is now terminated, which means the firm has finished removing the affected product; anything on pharmacy shelves today should be unaffected.

Other Metformin recalls

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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 PD-Rx Pharmaceuticals, Inc.

All 2020 recalls
Class II · Moderate risk

DULoxetine DR USP

CGMP Deviations: the presence of a Nitrosamine Drug Substance Related Impurity (NDSRI), N-Nitroso-Duloxetine above the interim acceptable intake limit

Terminated Nitrosamine impurity PD-Rx Pharmaceuticals, Inc. D-0163-2025
Class II · Moderate risk

Glimepiride USP

CGMP deviations.

Terminated cGMP deviation PD-Rx Pharmaceuticals, Inc. NDC 43063-0587-90 D-0559-2023