Disclosed are compositions and methods for the inhibition of biofilm formation or reduction of existing or developing biofilms in a patient. These methods also inhibit the aggregation of bacteria that form biofilms in the airways. The methods include administering to a subject that has or is at risk of developing biofilms a compound or formulation that inhibits the formation or polymerization of actin microfilaments or depolymerizes actin microfilaments at or proximal to the site of biofilm formation. Such a compound can be administered in combination with a compound or formulation that inhibits the accumulation or activity of cells that are likely to undergo necrosis at or proximal to the site of biofilm formation (i.e., neutrophils). The methods and compositions can further include the use of anti-DNA and/or anti-mucin compounds, as well as other therapeutic compounds and compositions.