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This review article discusses the development of respiratory therapeutics containing bacteriophages indicated for lung infections, specifically those that have become increasingly difficult to treat because of antibiotic resistance. Recent achievements and remaining problems are presented for each step necessary to develop a bacteriophage-containing dosage form for respiratory drug delivery, including selection of appropriate bacteriophages for therapy, processing and purification of phage preparations, formulation into a stable, solid dosage form, and delivery device selection. Safety and efficacy studies in animals and human subjects are also reviewed.

Theoretical models were applied to successfully achieve complex formulations with design challenges a priori. No further iterations to the design process were required.

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