http://www.medications.com/effect/view/24548 After 1 day of taking this medication, my body instantly didn't agree with it. I experienced dizziness, nausea, dry mouth, no appetite and the worst diarrhea that i ever experienced. I also kept vomiting and recieved a yeast infection in the process. Fi Fri, 09 May 2008 00:37:46 -0400 http://www.medications.com/effect/view/24548?item=8124 Yes, i have taken flagyl 2 times, and every time, exactly 24 hours after i get a dreaded yeast infection!!! Antibiotics cause yeast infections, its because they kill the bacteria, good and bad bacteria, which is why we take them when we have an infection. http://www.medications.com/effect/view/24548?item=8124