Evening all, Merry Christmas! I have been on metronidazole for a tooth abscess for 4 full days of a 7 day course now, pain has subsided but only slightly. Should I have noticed a massive improvement by now? The whole right hand side of my mouth is still swollen and I'm so fed up! Has anyone had any experience? Can it sometimes not work? Is maybe working but just slowly? Might I need different antibiotics? I will phone NHS 111 in the morning if I'm still in pain but just wanted some reassurance tonight. Thanks all ☺