Routine preoperative laboratory studies showed severe neutropenia and increased atypical lymphocytes in the peripheral blood.
[ncbi.nlm.nih.gov]
Based on available laboratory assessments, grade 3 or 4 neutropenia occurred in 87% of patients in each cohort, suggesting that the incidence of neutropenia was likely independent
[bloodjournal.hematologylibrary.org]
The most common side effects of Venclexta include low white blood cell count (neutropenia), diarrhea, nausea, anemia, upper respiratory tract infection, low platelet count
[fda.gov]