NAPLEX Practice Exam 2026 – Comprehensive Test Preparation

Dornase alfa (pulmozyme) is an enzyme that works by degrading extracellular DNA in the lungs. This action helps to reduce the viscosity of mucus in patients with cystic fibrosis, making it easier for them to clear their airways. Therefore, the correct answer is B.

Option A is incorrect because Dornase alfa does not have a direct effect on antibiotic absorption. Option C is also incorrect as it does not specifically prevent bacterial resistance. Option D is incorrect as Dornase alfa does not improve pancreas function; it is primarily used for pulmonary issues in cystic fibrosis patients.