Acute Acute Maxillary Sinusitis Amoxicillin Amoxicillin Maxillary Sinusitis Acute Maxillary Sinusitis Amoxicillin YolondahtyuiStachtyu Monday, June 5, 2017 Augmentin xr® (amoxicillin/clavulanate. A median (range). The halflife of amoxicillin after the oral administration of augmentin xr is appro...