Why Has My Stool Has Become Completely Liquid Twice A Day Since Starting Sibofix?

hi, in last one month i am having stomach issue like uneasiness, sometime light pain in stomach and feeling like motion every time and motion turned to semi liquid twice a day . I consulted a doctor and he prescribed SIBOFIX 400 for one month and 2 times a day. I started this 2 days back and started liquid motion twice a day and it s complete liquid this time after started SIBOFIX 400. what should i do?