I could not find my original thread for this. My son is down to 2 capsules of vancomycin after 10 weeks of a tapered dose. This is following 10 days of flagyl that obviously didn't work. he was doing better, now he has had diarrhea, gas, and pain several times tonight. It's been picking up over the past 4 or 5 days. Think it's c. diff still? I'm going to have the doctor order another stool study in the morning, but what has your experience been? Does your doc do labs routinely after abx? If he still has c diff what's next? I'm already exhausted by It as we're still trying to treat his perianal disease. Thanks!