The patient has a know allergy to penicillin, which would you anticipate not being ordered for your patients bacterial sinusitis?

The answer is amoxicillin. 
Acute bacterial rhinosinusitis is caused by a bacterial infection of the paranal sinus. Symptoms include facial pain and pressure, purilent drainage, congestion and fever. The most common bacteria associated with ABRS include Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis. 
Amoxicillin is considered the first line antibiotic for most patients with acute bacterial rhinosinusitis.