28 May 2020
// Jacob Bell BIOPHARMADIVE
https://www.biopharmadive.com/news/fda-metformin-ndma-contamination/578771/
28 May 2020
// PRNEWSWIRE
https://www.prnewswire.com/news-releases/fda-alerts-patients-and-health-care-professionals-to-nitrosamine-impurity-findings-in-certain-metformin-extended-release-products-301067454.html
02 Apr 2020
// Z. Brennan RAPS
https://www.raps.org/news-and-articles/news-articles/2020/4/fda-seeks-withdrawal-of-heartburn-drugs-due-to-new
https://www.pharmacompass.com/pdf/news/glenmark-pharmaceuticals-inc-usa-voluntarily-recalls-all-unexpired-lots-of-its-ranitidine-1576662691.pdf
11 Dec 2019
// Amy Lieu FOX10
https://www.fox10phoenix.com/news/fda-warns-of-carcinogen-found-in-diabetes-drugs-outside-of-us
10 Dec 2019
// Ben Hargreaves IN-PHARMATECHNOLOGIST
https://www.in-pharmatechnologist.com/Article/2019/12/09/Impurities-discovered-in-metformin