- Stratum 1 (HER2-positive disease): Patients receive trastuzumab IV over 30-90 minutes on days 1, 8, and 15, epirubicin hydrochloride IV over 30 minutes on day 2, and cyclophosphamide IV over 30 minutes on day 2. Treatment repeats every 3 weeks for up to 4 courses in the absence of disease progression or unacceptable toxicity. Patients then receive trastuzumab IV alone every 3 weeks until week 52.