Metformin Extended Release 500mg and 750mg Recall - Avkare

June 11, 2020

After notification of any recall, Express Scripts will continue processing new and refill prescriptions with product from non-recalled lots or manufacturers, if available.

Avkare is voluntarily recalling all non-expired lots of Metformin Hydrochloride Extended-Release Tablets, USP 500mg and 750mg distributed in the United States that were manufactured by Amneal Pharmaceuticals. Avkare was notified by the U.S. Food and Drug Administration that certain lots were tested and showed results for NDMA, an unexpected impurity, at levels in excess of acceptable. Out of an abundance of caution, Amneal extended the recall to all unexpired lots of Metformin Hydrochloride Extended-Release Tablets in the US, including medication that was repackaged and distributed by Avkare.

To date, no reports of adverse events related to this drug product recall have been reported.

What do I need to know?

  • Express Scripts will mail letters to patients who have received medication impacted by the recall detailing.
  • The Food and Drug Administration has stated that patients who have the recalled medicine should continue taking it until they have a new supply unless otherwise directed by their healthcare provider, as the risk of harm to the your health may be higher if the treatment is stopped immediately without any alternative treatment.
    • Please consult with your prescriber for guidance on continuing to take this medication or if you should obtain a new prescription for an alternative therapy.
    • If you and your prescriber decide you should continue to take the medication on hand, your next fill will be processed using medication that is not part of any existing recall.
    • If you choose to stay on this therapy but need to obtain a fresh supply and it is not time for your next refill, please call us at the toll free number on your prescription bottle to request an early refill. Your order will be filled with medication that is not part of any existing recall.

Why was this medication recalled?

  • This voluntary recall is being issued by Avkare and Amneal Pharmaceuticals working with the FDA because an impurity N-Nitrosodimethylamine (NDMA) was detected in certain lots. Amneal has further decided to extend the recall to all lots within expiry of Metformin Hydrochloride Extended Release Tablets, USP, 500 mg and 750 mg, out of an abundance of caution, including lots that were repackaged and distributed by Avkare.
  • Any suspected adverse events that may be related to the use of these products should be reported to your prescriber. You can also report adverse events that may be related to this recall to FDA's Med Watch Program either online, by regular mail or by fax.
  • Online:
  • Regular Mail: Use postage-paid, pre-addressed Form FDA 3500B available at: Mail to the address on the pre-addressed form.
  • Fax: 1-800-332-0178 (toll free)

Last updated: July 14, 2020

The information on this site is not intended to take the place of your doctor or other healthcare professionals. It is a resource to help you make the best decisions and get the most from the medical services available to you. A licensed physician should be consulted for diagnosis and treatment of all medical conditions.