Sinusitis
"Augmentin: The first time I took it was about 8 yrs ago. It did the job quick but I had diarrhea for about a year. {not kidding! also developed plantar fasciitis for a brief period possibly due to a lack of certain nutrients, caused by the extended bout of diarrhea} I did not know what probiotics are at the time!?:( 
I blamed myself and that other guy, My doctor for not mentioning the benefits of probiotics. Probiotics maintain a healthy level of good bacteria that most antibiotics will destroy, This prevents or minimizes greatly any diarrhea.
Augmentin also contains clavulanic acid which causes the upset stomach. Ranitidine, which is an acid reducer can help soften the sour stomach often associated with augmentin. Augmentin does work!!!"