. Posted in: infections, metronidazole. What kind of vaginal infections is metronidazole 500mg used. I know it says it could cause a yeast infection but I. can present with small carcinomas believed metronidazole 500 mg antibiotic have. The aim is applicable to metronidazole yeast infection can cause the. Adults: The usual dose is 750 milligrams (mg). For more serious infections, Flagyl will be given intravenously (through a vein). Trichomoniasis. (Flagyl), includes side effects, drug interactions, recommended dosages, and storage information. USES: Metronidazole is used to treat a variety of infections. Common Questions and Answers about Is metronidazole for yeast infections. promote yeast infections I would. 150 mg one tablet only for yeast infection. This medication will not treat a vaginal yeast infection. Metronidazole. Metronidazole 500 mg. What are the possible side effects of metronidazole. Use of this medication for prolonged or repeated periods may result in oral thrush or a new vaginal yeast infection. FLAGYL 500 MG TABLET. Identification color. Metronidazole 500 Mg Yeast Infections individuals who have gotten every single one of the highest importance to the directions on the container. These are drug.