bacterial infection
"I had Mirena for 2 years and suffered from

Continuous BV.  I have been on Flagyl many many times. I had to have my marina taken out three months ago and I didn't have anymore a BV until this past week.  I am taking a seven day does two times a day. This is the first time that it has caused a metallic taste in my mouth and horrible time trying to sleep. I can't seem to fall asleep and when I do I am restless and up every 10 to 15 minutes. On the plus side I know when I i'm done with this prescription I will be completely treated so it is worth it."