Independent register of U.S. FDA drug recalls · updated Oct 10, 2026
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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/ Hydrochlorothiazide Tablets

CGMP Deviations: FDA lab confirmed presence of an impurity, N-Methylnitrosobutyric acid (NMBA) in the finished product above the interim acceptable daily intake level of 9.82 parts per million.

Ongoing Nitrosamine impurity Torrent Pharma Inc. D-0124-2020
Class II · Moderate risk

Losartan Potassium /Hydrochlorothiazide Tablets

CGMP Deviations: FDA lab confirmed presence of an impurity, N-Methylnitrosobutyric acid (NMBA) in the finished product above the interim acceptable daily intake level of 9.82 parts per million.

Ongoing Nitrosamine impurity Torrent Pharma Inc. D-0123-2020
Class II · Moderate risk

Losartan Potassium Tablets

CGMP Deviations: FDA lab confirmed presence of an impurity, N-Methylnitrosobutyric acid (NMBA) in the finished product above the interim acceptable daily intake level of 9.82 parts per million.

Ongoing Nitrosamine impurity Torrent Pharma Inc. D-0122-2020
Class II · Moderate risk

Losartan Potassium Tablets

CGMP Deviations: FDA lab confirmed presence of an impurity, N-Methylnitrosobutyric acid (NMBA) in the finished product above the interim acceptable daily intake level of 9.82 parts per million.

Ongoing Nitrosamine impurity Torrent Pharma Inc. D-0121-2020
Class II · Moderate risk

Losartan Potassium Tablets 50 mg 1000 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.

Terminated Nitrosamine impurity Macleods Pharma Usa Inc NDC 33342-045-44 D-1458-2019
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.

Terminated Nitrosamine impurity Macleods Pharma Usa Inc NDC 33342-045-10 D-1457-2019
Class II · Moderate risk

Losartan Potassium

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

Terminated Nitrosamine impurity Golden State Medical Supply Inc. NDC 60429-318-90 D-1465-2019
Class II · Moderate risk

Losartan Potassium

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

Terminated Nitrosamine impurity Golden State Medical Supply Inc. NDC 60429-317-10 D-1464-2019
Class II · Moderate risk

Losartan Potassium

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

Terminated Nitrosamine impurity Golden State Medical Supply Inc. NDC 60429-317-90 D-1463-2019
Class II · Moderate risk

Losartan Potassium

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

Terminated Nitrosamine impurity Golden State Medical Supply Inc. NDC 60429-317-30 D-1462-2019