WITHDRAWN: A Resource for Withdrawn and Discontinued Drugs


Toxicity Types


The safety reasons for drug withdrawal are broadly grouped into 14 different toxicity types adapted from the WHO's ATC classification. To view the drugs associated with a particular toxicity type, please click on the name of the toxicity type within the interactive wheel visualization. The number within brackets after toxicity type indicates the total number of drugs associated with that toxicity type. You can see the distribution of drugs within each toxicity type by ATC classes. For better visualization, open the wheel visualization in a new tab by clicking here.

For a much simpler grouping of toxicity types, click here.