Infectious complications associated with immune and targeted anti-cancer therapies: a retrospective study of the FDA Adverse Events Reporting System (FAERS)

Immune and targeted anti-cancer therapies are associated with an increased risk of infectious complications. The objectives of the present study were to evaluate the infectious complications associated with immune and targeted anti-cancer drugs. This was a retrospective study for immune and targeted anti-cancer drugs submitted to the FDA Adverse Event Reporting System (FAERS) from 1996 to 20 March 2024. The primary outcome was the rate of infectious disease events, and the secondary outcomes were the incidence of febrile neutropenia (FN), all-cause mortality, and the top 10 infections in each class. Our study included 14 drug classes comprising 44 drugs. The incidence of infectious complications was 14.31% (110,671/773,130). The highest incidence rate was reported with IL-6 inhibitors (30.89%), the highest incidence of FN was reported with Histone deacetylase inhibitors (8.43%), and the highest all-cause mortality was reported with BCR-ABL tyrosine kinase inhibitors (17.17%). Immune and targeted anti-cancer therapies vary in the incidence of infectious complications. Pirtobrutinib, copanlisib, sirolimus, vorinostat, and tocilizumab were associated with high infectious complications (>30%) that warrant emphasis in the clinical guidelines. Thus, clinicians should vigilantly monitor patients undergoing immune and targeted therapies for infectious complications and use antimicrobial prophylaxes when indicated.