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Drug design/development pioneers

Powder injection applies many of the principles of pulmonary delivery of dry powders to the lungs The drug has to be in the form of very small particles, is dispensed from a reservoir, and is delivered as an aerosol i.e., particles are dispersed in a gas. Liquid or dissolved drug can be delivered by precipitation or adsorption onto carrier particles. The big difference with pulmonary delivery is the momentum at which the particles are delivered. Driven by a high-pressure helium gas stream, the particles travel fast enough to penetrate the outer layer of the skin, the stratum corneum. The design of devices to deliver needle-free injection of solids was pioneered by researchers at the University of Oxford who founded PowderJect Pharmaceuticals PLC in 1993 (now PowderMed Ltd.) to develop the only powder-based technology so far. Since that... [Pg.234]


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Drug design/development

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