In an open-label , randomised clinical trial , we assigned subjects with recurrent C. difficile infection to receive : FMT , short regimen of vancomycin ( 125mg four times a day for 3days ) , followed by one or more infusions of faeces via colonoscopy ; or vancomycin , vancomycin 125mg four times daily for 10days , followed by 125-500mg / day every 2-3days for at least 3weeks .