ITS CALLED VOWST . ITS A PILL YOU TAKE 4 OF THEM 3 DAYS IN A ROW. HOWEVER THE PREP IS TERRIBLE. TASTE GOOD, BUT YOUR STOMACH IS RUMBLING FOR DAYS AFTERWARD. YOU HAVE TO HAVE A GASTRO DOCTOR ORDER IT. YOU HAVE TO FIT THE PROTOCAL. MUST HAVE HAD AT LEAST CDIFF TWICE. THE COMPANY IT COMES FROM IS AMBER SPECIALTY. THERE NUMBER IS 877-703-3647. HOWEVER ITS $17.000 FOR 12 PILLS, BUT IF YOU FIT THE PROTOCAL. IT IS FREE. GOOD LUCK