Patent ID: 7683029

Claim:
An aerosol generating device, comprising: a liquid source of a liquid aerosol formulation comprising a high volatility carrier and insulin; a flow passage in fluid communication with the liquid source wherein the flow passage has an outlet which opens into ambient air; a heater disposed to heat the liquid aerosol formulation in a heated portion of the flow passage to 100 to 150° C. to produce a vapor which exits the flow passage outlet and admixes with ambient air to produce a dry powder aerosol; a power supply; and a controller operable to deliver a dose of the liquid aerosol formulation to the flow passage and control power from the power supply to the heater so as to maintain the heater at a temperature range of 100 to 150° C. effective to vaporize the liquid aerosol formulation in the flow passage and produce an emitted dose of the dry powder aerosol in ambient air, wherein the aerosol generator is operable to achieve a respirable fraction of at least 70% of the emitted dose.