Lactobacillus Rhamnosus in Prevention of Chemotherapy-related Diarrhoea

This is a prospective, multicenter, randomized, cross-over, double-blind, placebo-controlled study. Patients diagnosed with advanced colorectal cancer with overt distant metastases and who will receive chemotherapy consisting of capecitabine, oxaliplatin and bevacizumab, given as 3-weekly cycles, will be randomly assigned to receive either lactobacilli (GefilusR) or placebo during the first 3 cycles of chemotherapy (for 9 weeks). Following this, the groups will be crossed over and those study participants who were allocated to lactobacilli will receive placebo for 9 weeks, and vice versa. Lactobacilli and placebo are administered twice daily. The total daily dose of lactobacilli is 20 billion CFU. The primary outcome measure is frequency of moderate/severe diarrhoea (grade 2-4). Adverse effects (including the frequency of diarrhoea, flatulence, bloating, constipation, and nausea) will be longitudinally monitored based on a patient diary and study visits. The study will also address safety and tolerability of chemotherapy, response to chemotherapy, progression-free survival, resectability of liver metastases, and serum growth factor levels. A total of 84 patients are planned to be entered.