Severe exacerbation defined as:
Obtain sputum culture
Ceftriaxone 1-2g IV daily
If severe without risk factors
OR
Levofloxacin 750mg IV/PO daily
Cefepime 1g IV q6h
Piperacillin/tazobactam 4.5g IV q6h
5-10 days (clinical judgement)