Der var ligeledes en stigning i hæmatologisk toksicitet hos patienter, som fik Herceptin og docetaxel sammenlignet med docetaxel alene (32% grad 3⁄4 neutropeni versus 22%, under anvendelse af NCI- CTC kriterier).
Haematological toxicity was also increased in patients receiving Herceptin and docetaxel, compared with docetaxel alone (32% grade 3/ 4 neutropenia versus 22%, using NCI-CTC criteria).