Which antibiotic is considered frontline in COPD exacerbations with pseudomonal coverage?

• A. Azithromycin
• B. Doxycycline
• C. Amoxicillin
• D. Levofloxacin

Answer: (D)

When a COPD flare is likely to involve Pseudomonas, you need an antibiotic with reliable antipseudomonal activity that can be given orally for outpatient management. Levofloxacin fits this need because it covers Pseudomonas aeruginosa and the common COPD pathogens, and it has excellent lung penetration with high oral bioavailability, allowing effective outpatient therapy.

Azithromycin, while useful for COPD due to anti-inflammatory effects and coverage of atypicals, does not reliably cover Pseudomonas, so it’s not the best choice when pseudomonal coverage is needed. Doxycycline and amoxicillin lack adequate antipseudomonal activity, making them unsuitable in a setting where Pseudomonas is a concern.

So the best option is levofloxacin because it provides the necessary pseudomonal coverage with a convenient oral regimen suitable for frontline therapy.