To Assess Efficacy and Safety of Oral Reparixin in Patients With Fatigue and Locally Advanced / Metastatic Breast Cancer

This is a phase 2, multinational, multicenter, randomized, double-blind, placebo-controlled study. It will evenly randomize 68 evaluable men and women adult patients with CRF in locally advanced or metastatic breast cancer who are candidates to start single-agent taxane chemotherapy (paclitaxel, nab-paclitaxel or docetaxel). CRF will be assessed at baseline on a scale from 0 - 10 (with 10 being most severe), enrolling any patient who report a score of 1 - 6. Recruitment will be competitive among the study sites, until the planned number of patients is randomized. Patients will be assigned (1:1) to receive either oral reparixin treatment (1200 mg t.i.d. - treatment group) or masked placebo t.i.d. (control group). Randomization will be stratified by site and according to the type of chemotherapy (paclitaxel vs docetaxel vs nab-paclitaxel). Sparse blood samples will be collected in the whole population for reparixin (and metabolites), docetaxel, nab-paclitaxel, paclitaxel PK analysis. Reparixin or placebo will be administered for 16 weeks or until disease progression, withdrawal of consent or unacceptable toxicity, whichever occurs first. Following the completion of the treatment, or after premature discontinuation during the double-blind phase the patients will be followed up for safety assessments for an additional 30 days after last study therapy administration and will be followed for progressive disease and survival until twelve months after last enrolled subject off treatment, or until trial is terminated for other reasons, whatever occurs first. Number of Patients Sixty-eight (68) evaluable adult patients with CRF with locally advanced or metastatic breast cancer who are candidates to receive single-agent taxane chemotherapy will be included in the study. Assuming that 10% of subjects will not be evaluable for primary analysis, a total of approximately 76 subjects is expected to be enrolled.