When a reference listed drug (RLD) product is discontinued from marketing, or if the RLD’s NDA application is officially withdrawn, we all know that the FDA must make a determination that the specific RLD was not discontinued from marketing or withdrawn for safety or efficacy reasons before it can approve an ANDA based on the […]
Two years after the FDA guidance on Control of Nitrosamines Impurities in Human Drugs and nearly a year after the publication of USP’s General Chapter <1469> Nitrosamine Impurities, where are we now and what have we learned? That was a question posed recently at the Association of Accessible Medicine’s GRx+Biosims 2022 conference. The session devoted […]
Today, the FDA advised that it “recently became aware of a nitrosamine impurity, Nitroso‑STG‑19 (known as NTTP), in certain samples of sitagliptin, a medicine used to treat type 2 diabetes mellitus. To avoid a shortage and help ensure patients have access to an adequate supply of the medicine, the FDA will not object to the temporary […]
Yesterday, the Agency expressed confidence that manufacturers of varenicline tablets containing the N‑nitroso-varenicline impurity can meet the FDA’s original acceptable intake limit of 37 ng or less per day. Their statement read: “FDA is now confident in manufacturers’ ability to supply patients with varenicline containing the N-nitroso-varenicline impurity at or below the agency’s acceptable intake limit […]
