Traditionally, spray drying has been utilized as a useful technology for enhancing the delivery of small molecules via the oral route, in either tablet or capsule dosage forms. 

However, in more recent times, spray drying has emerged as the method of choice for creating dry powders for delivery in an increasing range of products incorporating oral, pulmonary, nasal, and injectable dosage forms. 

The expansion of spray drying beyond oral dosage forms has seen this flexible drying technology being used to create dry powders containing small molecules and much larger, more complex molecular structures such as biologics. These dry powder biologics require more complex assay techniques than those typically used for dosage forms containing small molecule API’s.

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