The attributing factor in the increased incidence of drug-induced neutropenia is; treatment of cancer by chemotherapuetic drugs such as alkylating agents.
Drug-induced neutropenia is a condition in which there is reduction in absolute neutrophil count (ANC), caused by exposure to a medication. Drug-induced neutropenia usually occurs within the first few weeks after the introduction of drugs. Drug-induced neutropenia is a common adverse effect associated with many chemotherapy agents (drugs used in the treatment of cancer).