My daughter improved significantly on the 14-day trial of Augmentin (no steriod burst), but the day after the "trial" ended she started a backslide of epic proportions because she was, of course, being exposed to strep at school. To this day, I still don't understand why she was given such a short course of abx (and a wimpy dose at that!) and then left unprotected for another infection. I'd say if the dose of Augmentin didn't work, ask for a higher dose, and if that still doesn't work, try something else and try it for at least 30 days. We've had great success with Augmentin 600 ES. DD, 7, has been on it for about 4 months.