This technology can also be applied for small molecules to be delivered in a powdered form for inhalation.
Many pharmaceutical substances such as proteins and peptides cannot be delivered orally. To avoid the need for an injection there has been an increasing interest in pulmonal delivery. To allow the substances to travel deep into the lung it is necessary to have them in form of very fine powder.
Spray drying has become the method of choice for the preparation of fine particles for inhalation.
The spray dryer must be equipped with a special atomization device to produce the very fine droplets in an even size and a device for fine particle collection.