There is a recall of Metformin Extended-Release Tablets 500 mg.
More are expected -
https://www.drugtopics.com/latest/first-big-metformin-product-recalled-more-way
https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/apotex-corp-issues-voluntary-nationwide-recall-metformin-hydrochloride-extended-release-tablets