I am on ortho tri cyclen. I took 3 days of metronidazole. Last night i had sex with my boyfriend and he ejaculated inside me. My last menstrual period was June 15th. Is it ok to day plab b? Will it make me sick? Will the antibiotics effect plan b? How far off track will my period be if i take plan b?
Since taking (finishing the course of) metronidazole, if you haven't taken 7 active pills then the risk of becoming pregnant is high. I would suggest that you take Plan B just to be sure.
Metronidazole won't affect the effectiveness of Plan B.
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