bacterial infection
"Honestly, I felt better about 4 hours after begging treatment with this for an infected/abcessed tooth.  Surprisingly quick, considering the amount of pain I was in.  The downside, for me at least, seems to be slight nausea/dizziness.  I had taken ibuprofen earlier due to pain, so this meant bad times in front of the toilet.  Be careful with other meds that may upset your stomach."