Tolerability The main dose limiting toxicity associated with IV vinorelbine in lung cancer is myelosuppression with Grade 3-4 neutropenia seen in up to 46% of patients. However, the febrile neutropenia rate was low at <5%. Mild to moderate gastrointestinal toxicity was observed with nausea and vomiting being the most common adverse effect. Grade 3/4 nausea or vomiting occurred in 7% - 17% of patients and primary prophylaxis is recommended. Neurotoxicity was also reported with the use of vinorelbine. Peripheral neuropathy was observed in up to 11% of patients,and neuroconstipation was documented to affect up to 24% of patients, however most of these cases were mild, grade 1-2. A similar toxicity profile was observed in patients with platinum resistant ovarian cancer treated with vinorelbine. Leukopenia was the most common dose limiting toxicity followed by anemia, fatigue and nausea.