Independent register of U.S. FDA drug recalls · updated Oct 10, 2026
RxRecalls Get alerts

Nitrosamine impurities (NDMA/NDEA)

Trace nitrosamine impurities such as NDMA, NDEA or NMBA found above the acceptable daily limit. Nitrosamines are probable human carcinogens that can form during manufacturing or storage. This is the cause behind the large valsartan, losartan and ranitidine (Zantac) recalls.

568 FDA drug recalls with this cause, newest first.

Nitrosamine compounds such as NDMA, NDEA or NMBA are probable human carcinogens that can form during manufacturing or storage. Recalls here trace back to a nitrosamine found above the accepted limit - whether the report names the compound or simply calls it a 'carcinogenic impurity'. It is a newer category, driven by improved testing methods that can now detect impurities that were previously missed, and it is the chemistry behind the large valsartan, losartan and ranitidine (Zantac) recalls.

Class II · Moderate risk

Losartan Potassium Tablets USP 50 mg

CGMP Deviations: FDA lab confirmed presence of an impurity, N-Methylnitrosobutyric acid (NMBA) in the finished product above the interim acceptable daily intake level

Terminated Nitrosamine impurity Avet Pharmaceuticals, Inc. NDC 23155-645-03 D-1103-2020
Class II · Moderate risk

Losartan Potassium Tablets

CGMP Deviations: impurity for N-Nitroso-N-methyl-4-aminobutyric acid (NMBA) detected in the active pharmaceutical ingredient (API) used to manufacture finished products.

Ongoing Nitrosamine impurity Teva Pharmaceuticals USA NDC 0591-3747-00 D-1102-2020
Class II · Moderate risk

Losartan Potassium Tablets

CGMP Deviations: impurity for N-Nitroso-N-methyl-4-aminobutyric acid (NMBA) detected in the active pharmaceutical ingredient (API) used to manufacture finished products.

Ongoing Nitrosamine impurity Teva Pharmaceuticals USA NDC 0591-3746-00 D-1101-2020
Class II · Moderate risk

Losartan Potassium Tablets

CGMP Deviations: impurity for N-Nitroso-N-methyl-4-aminobutyric acid (NMBA) detected in the active pharmaceutical ingredient (API) used to manufacture finished products.

Ongoing Nitrosamine impurity Teva Pharmaceuticals USA NDC 0591-3745-00 D-1100-2020
Class II · Moderate risk

Ranitidine 300 mg

CGMP Deviations: Presence of NDMA impurity detected in product.

Terminated Nitrosamine impurity Direct Rx NDC 61919-455-30 D-0017-2021
Class II · Moderate risk

Ranitidine 150 mg

CGMP Deviations: Presence of NDMA impurity detected in product.

Terminated Nitrosamine impurity Direct Rx NDC 61919-339-60 D-0016-2021
Class II · Moderate risk

ranitidine hydrochloride

CGMP Deviations: Received notice from supplier of potential -Nitrosodimethylamine (NDMA) amounts above established levels.

Terminated Nitrosamine impurity PD-Rx Pharmaceuticals, Inc. NDC 43063-844-14 D-0826-2020
Class II · Moderate risk

Nizatidine Capsules

CGMP Deviations: Trace amounts of an impurity, N-nitrosodimethylamine (NDMA) was detected in the API Nizatidine.

Terminated Nitrosamine impurity Mylan Pharmaceuticals Inc. NDC 0378-5300-93 D-0792-2020
Class II · Moderate risk

Nizatidine Capsules

CGMP Deviations: Trace amounts of an impurity, N-nitrosodimethylamine (NDMA) was detected in the API Nizatidine.

Terminated Nitrosamine impurity Mylan Pharmaceuticals Inc. NDC 0378-5150-91 D-0791-2020
Class II · Moderate risk

Ranitidine

CGMP Deviations: Presence of NDMA impurity detected in product.

Terminated Nitrosamine impurity H J Harkins Company Inc dba Pharma Pac D-0793-2020
Class II · Moderate risk

Ranitidine Tablets

CGMP Deviations: Presence of NDMA impurity detected in product.

Terminated Nitrosamine impurity Denton Pharma, Inc. NDC 70934-287-15 D-0795-2020
Class II · Moderate risk

Ranitidine Tablets

CGMP Deviations: Presence of NDMA impurity detected in product.

Terminated Nitrosamine impurity Denton Pharma, Inc. NDC 70934-017-04 D-0794-2020