dental abscess
"On metronidazole for the 3rd time in the last few months( I completed all the  previous course prescribed)  and had a tooth extraction  of my back tooth following a failed root canal. I have been prescribed again with a metronidazole as I know amoxicillin would not touch the ongoing abscess ... I am on my 3rd day  of metronidazole 400 mg thrice a day and no signs of abscess settling down and don't think I can do with the side effects anymore. I have headache, feeling spaced out, moodiness and trouble sleeping for the last 2 days.It's 2:40 am and I am wide awake and not had a good night sleep the night before..  I just can't bear the idea of being in too much pain over the Christmas holidays and hoping the abscess will drain now tooth is out."