Adverse effect


  • Adverse Event

An adverse effect is an unexpected medical problem or abnormality that occurs during or after treatment with a drug. DrugBank primarily obtains this information from product labeling and less frequently through literature searches. Adverse effects are not necessarily caused by the drug, and may result from unrelated issues or conditions  1,2.

[Structured adverse effects] offer detailed and specific information about drug adverse effect profiles, including  incidence, evidence type, age group, patient characteristics, and other data relating to the adverse effect.


  1. NCI Cancer Term Definitions: Adverse Effect [Link]
  2. World Health Organization International Definitions [File]