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

Impurities & degradation products

An impurity or degradation product above its limit - other than nitrosamines. Unexpected substances in a batch can make it unsafe or less effective, even when the active ingredient is present.

704 FDA drug recalls with this cause, newest first.

Every drug has a specification for how much of each impurity or breakdown product it may contain. These recalls are lots that exceeded one of those limits - often a related compound formed during manufacturing or storage, or an out-of-specification result found during routine stability testing. Nitrosamine impurities are common enough to get their own category; everything else lands here.

Class III · Low risk

Atorvstatin Calcium Tablets

Failed Impurities/Degradation Specifications: Out of Specification results for related substance.

Terminated Impurity / degradation Dr. Reddy's Laboratories, Inc. NDC 55111-124-90 D-0726-2022
Class II · Moderate risk

hydrALAZINE HCl Tablets

Failed Impurities/Degradation Specifications: Out of specification result obtained during routine stability testing for Impurities.

Terminated Impurity / degradation The Harvard Drug Group NDC 0904-6440-61 D-0653-2022
Class II · Moderate risk

Dexamethasone Elixir

Failed Impurities/Degradation Specifications: higher than permissible levels of unknown impurities were found in the drug product.

Terminated Impurity / degradation Morton Grove Pharmaceuticals, Inc. NDC 60432-466-08 D-0713-2022
Class II · Moderate risk

Diazepam Oral Solution

Failed Impurities/Degradation Specifications: Out of specification results for related substances.

Terminated Impurity / degradation Lannett Company, Inc. NDC 0527-1768-36 D-0558-2022
Class II · Moderate risk

Erythromycin Topical Gel USP

Failed Impurities/Degradation Specifications: Lot not meeting specification for Unknown Max Related Compounds.

Terminated Impurity / degradation Teligent Pharma, Inc. NDC 63739-053-66 D-0716-2022
Class II · Moderate risk

Sodium Phenylbutyrate Powder

Failed Impurities/Degradation Specifications; Out of Specification impurity results obtained during routine testing.

Terminated Impurity / degradation SigmaPharm Laboratories LLC NDC 42794-086-14 D-0898-2021