Lupin Metformin Hydrochloride Extended-Release Tablets, 500mg and 1000mg recall: N-Nitrosodimethylamine (NDMA) Impurity
N-Nitrosodimethylamine (NDMA) Impurity



The hazard: Harmful chemical exposure
The hazard here is chemical rather than mechanical, so the right response is to stop using the product and to ventilate or clean anywhere it has been applied.
What the notice says: Risk Statement: NDMA is classified as a probable human carcinogen (a substance that could cause cancer) based on results from laboratory tests.
Why it matters: A chemical that should not be present at this level was found in the product. Depending on the substance, the concern may be a burn or irritation on contact, or a long-term risk from repeated exposure.
Symptoms and when to call a doctor
For a splash or spill, rinse the skin or eyes with running water for 15 to 20 minutes and remove contaminated clothing. If the product was swallowed, or if there is any trouble breathing, call Poison Control on 1-800-222-1222, which operates free and around the clock — or 911 if the person is collapsing, struggling to breathe or unconscious. Take the container or a photo of the label with you to any appointment.
This page is general information, not medical advice. If you feel unwell, a clinician who can see you is the only person able to judge your case.
Recall details
- Published
- July 8, 2020
- Risk level
- Elevated risk
- Issued by
- U.S. Food and Drug Administration
- Brand
- Lupin
- Product type
- Prescription & OTC drugs
- Distribution
- Nationwide
Products covered by this recall
Metformin Hydrochloride Extended-Release Tablets, 500mg and 1000mg
What the company announced
Lupin Pharmaceuticals Inc. is voluntarily recalling all batches of Metformin Hydrochloride Extended-Release Tablets USP, 500mg and 1000mg to the consumer level. As part of the ongoing assessment and continuation of the dialog with the FDA, additional analysis revealed that certain tested batches were above the Acceptable Daily Intake Limit for the impurity N-Nitrosodimethylamine (NDMA). Out of an abundance of caution, the company is recalling all batches of Metformin Hydrochloride Extended-Release Tablets USP, 500mg and 1000mg in the US. To date, Lupin Pharmaceuticals Inc. has not received any reports of adverse events related to this recall.
Risk Statement: NDMA is classified as a probable human carcinogen (a substance that could cause cancer) based on results from laboratory tests. NDMA is a known environmental contaminant and found in water and foods, including meats, dairy products and vegetables.
Metformin Hydrochloride Extended-Release Tablets USP is a prescription oral medication indicated as an adjunct to diet and exercise to improve blood glucose control in adults with type 2 diabetes mellitus. Metformin Hydrochloride Extended-Release Tablets USP, 500mg and 1000mg is packaged in 60, 90 and 100 count bottles and was distributed nationwide in the US to wholesalers, distributors, drug chain, mail order pharmacies and supermarkets. The recalled NDC’s are included in the table below:
- Product: Metformin Hydrochloride Extended-Release Tablets USP · Strengths: 500mg · NDC: 68180-338-01 · Distribution Dates: 11/21/2018 - 05/27/2020
- Product: 1000mg · Strengths: 68180-339-09
- Product: 500mg · Strengths: 68180-336-07 · NDC: 11/05/2018 - 05/22/2020
- Product: 1000mg · Strengths: 68180-337-07
Lupin Pharmaceuticals Inc. is notifying its wholesalers, distributors, drug chain, mail order pharmacies and supermarkets by phone and through recall notification and is arranging for the return of all the recalled product NDC’s.
Patients taking Metformin Hydrochloride Extended-Release Tablets, USP 500 mg and 1000mg, are advised to continue taking their medication and contact their pharmacist, physician, or medical provider for advice regarding an alternative treatment. According to the U.S. Food & Drug Administration, it could be dangerous for patients with this serious condition to stop taking their metformin without first talking to their health care professionals. Please visit the agency’s website for more information at https://www.fda.gov/drugs/drug-safety-and-availability/fda-updates-and-press-announcements-ndma-metformin .
Wholesalers, distributors, and retailers that have Metformin Hydrochloride Extended-Release Tablets USP, 500mg and 1000mg that are being recalled should discontinue distribution of the recalled product NDC’s immediately and return it to Inmar Rx Solutions, Inc., 635 Vine St, Winston Salem, NC 27101. Tel: (855) 532-1856 .
Consumers, wholesalers, distributors, and retailers with questions regarding this recall should contact Inmar Rx Solutions, Inc. at (855) 532-1856 Monday – Friday 09:00 am to 05:00 pm EST. For reimbursement, please have the recalled NDC’s returned to Inmar Rx Solutions, Inc.; the NDC number can be found on the top of the bottle label.
Adverse reactions or quality problems experienced with the use of this product may be reported to the FDA's MedWatch Adverse Event Reporting program either online, by regular mail or by fax.
Complete and submit the report Online
Regular Mail or Fax: Download form or call 1- 800-332-1088 to request a reporting form, then complete and return to the address on the pre-addressed form, or submit by fax to 1-800-FDA-0178
This recall is being conducted with the knowledge of the U.S. Food and Drug Administration.
Reproduced from the company announcement posted on fda.gov. Links and contact forms in the original are not repeated here; the official notice below has them.
Check your product
The notice names 7 codes you can read straight off the package. Type the one printed on yours and the list below narrows to it.
Lot or batch code
Usually ink-stamped near the seam, the cap or the bottom of the pack.
- 500mg
NDC number
On the carton and again on the bottle or blister label.
- 68180-338-01
Model or item number
On the rating label, the box or the instruction sheet.
- 1000mg
- 500mg
Package size
Match the net weight or the piece count on the front of the pack.
- 500 mg
- 1000 mg
- 100 count
Codes are lifted verbatim from the FDA — Company recall announcements notice. A code that is missing here may still be covered — the official notice is the complete list.
What to do about Chemical
Lupin — The hazard here is chemical rather than mechanical, so the right response is to stop using the product and to ventilate or clean anywhere it has been applied.
- Stop using the product and keep it away from children and pets.
- If anyone has symptoms, call Poison Control on 1-800-222-1222 rather than guessing.
- Do not pour it down a drain or into a bin without checking local hazardous-waste rules, and never mix it with another cleaner.
- Ventilate the room if the product was sprayed or applied there.
If the claim stalls
Most recall claims are paid without argument. The ones that stall usually stall for a reason you can fix.
- Check you used the recall channel rather than ordinary customer support — the two queues rarely talk to each other.
- If the company is unresponsive or has stopped trading, report it to the CPSC at SaferProducts.gov, and try the retailer in parallel.
- Paid by card? A chargeback for goods that are unfit for sale is a legitimate fallback once the company has had a fair chance.
- Send the photos they asked for in the format they asked for. A missing date code is the single commonest reason a claim sits unprocessed.
Remedy named in the notice: Wholesalers, distributors, and retailers that have Metformin Hydrochloride Extended-Release Tablets USP, 500mg and 1000mg that are being recalled should discontinue distribution of the recalled product NDC’s immediately and return it to Inmar Rx Solutions, Inc., 635 Vine St, Winston Salem, NC 27101.
Company contact: Lupin Pharmaceuticals, Inc. — Consumers: Inmar, Rx Solutions, Inc., (855) 532-1856 — Media: Arvind Bothra, [email protected]
The official notice
This page summarises a notice published by U.S. Food and Drug Administration. The agency notice is the authoritative version — read it before you act, and treat it as the final word if anything here looks different.
Open the FDA — Company recall announcements record U.S. Food and Drug Administration recalls
Questions people ask about this recall
Why was Lupin prescription & otc drugs recalled?
N-Nitrosodimethylamine (NDMA) Impurity Risk Statement: NDMA is classified as a probable human carcinogen (a substance that could cause cancer) based on results from laboratory tests.
How do I know if I have the recalled product?
Match the codes printed on your package against the notice: lot code 500mg; model number 1000mg, 500mg. If the code on your package is not on that list, your unit is outside the recall.
What should I do with it right now?
Stop using the product and keep it away from children and pets.
Can I get my money back?
The notice says: Wholesalers, distributors, and retailers that have Metformin Hydrochloride Extended-Release Tablets USP, 500mg and 1000mg that are being recalled should discontinue distribution of the recalled product NDC’s immediately and return it to Inmar Rx Solutions, Inc., 635 Vine St, Winston Salem, NC 27101.
Where was the recalled product sold?
It was distributed nationwide.
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