The recommended dose of this antibiotic is two tablets (a total of 2000 mg of amoxicillin and 125 mg of clavulanic acid) every 12 hours. For sinus infections, Augmentin XR is usually taken for 10 days. For pneumonia, it is typically taken for 7 to 10 days.
(For more information, click Augmentin Dosage. This article discusses the drug's dosing guidelines in greater detail, including why it's a good idea to take each dosage at the beginning of a meal.)