This registry is a place to share positive or negative side effects of using Metronidazole. If you directly experienced a side effect while using Metronidazole, then we encourage you to enter it here. Please note that entries here are the experiences of individual users, and in no way means that you or anyone else will experience the same side effect, since the same medication affects people in different ways. Please always contact your physician.
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November 11th
2008
9:00 AM
I took this medication for 7 days 2 times a day for bacterial vaginosis. I thought I was pregnant!!! I am always regular each month and on this medication I got my period 3 days early! It was thought to be implantation bleeding because it was very light etc. All except it lasted 8 days my period only last 4 days. I believe this medication messed my cycle up for the month. I just got the results from a blood test I am not pregnant!!!? It's got to be from the antibiotic. Has this ever happened to any one????
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