- Subjects must be off other anti-tumor agents for at least 5 half lives of the agent or 4 weeks from the last day of treatment, whichever is shorter. Endocrine therapies (e.g., for breast or prostate cancer) and anti-Her2 therapies (for example, trastuzumab, pertuzumab, or lapatinib) are allowed to continue while on this study. Bisphosphonates or denosumab are allowed for subjects with bone metastasis.