Antibiotics?: A sinus infection in a 3 month old is typically diagnosed after having significant nasal congestion and a cough that persists beyond 14 days, when a typical cold would have resolved. This condition is generally best treated with a prolonged course (14-21 days) of an antibiotic such as augmentin (amoxicillin and clavulanate).
Answered 11/20/2012
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