- At least 3 weeks since the last dose of other potentially myelosuppressive treatment (at least 6 weeks since last dose of nitrosoureas or mitomycin C) and recovery from manifestations of reversible drug toxicity (alopecia, stable residual neuropathy, and residual hand and foot syndrome are excluded). Patients with prior doxorubicin chemotherapy must have total cumulative dose of no more than 450 mg/m2.