Ab Astra

Astra Aktiebolag

Kjell I Wetterlin

Eva A Trofast

Jan Andersson

Hans Jagfeldt

Risto K Virtanen

Jan-Eric Lindahl

Hans J&auml;gfeldt

Hans J&auml;gf&auml;ldt

System for dispensing pharmaceutical active compounds

System for dispensing pharmaceutically active compounds

Dose indicating device

Inhalation device

A system for dispensing a clinically effective dose of an inhalable, pharmaceutically active compound, which system includes a dry powder inhaler device containing a powder containing the pharmaceutically active compound, wherein (a) of the powder particles dispensed by the inhaler device (the 'metered DPI dose'), at least 40% are less than about 10 microns in diameter at the point the particles exit the inhaler, (b) the metered DPI dose is sufficient to produce a clinically effective result in a patient; and (c) the amount of the compound in the metered DPI dose is not more than 70% of the minimal amount of the compound which, when dispensed in a pressurized metered dose inhaler, produces an equivalent clinically effective result in the same patient.

A method is provided for dispensing a clinically effective dose of an inhalable, pharmaceutically active compound. The method includes providing a dry powder inhaler containing a powder including the pharmaceutically active compound, and administering to a patient a dose of the compound that is less than 70% of the dose that would be necessary to obtain a physiologically equivalent result were the compound administered by a pressurized metered dose inhaler. The pharmaceutically active compound is in the form of primary particles at least 80% of which have a particle size of less than 10 microns, and the primary particles are provided as agglomerates which are deagglomerated during inhalation so that at least 40% of the dose administered is in the form of primary particles.

Dosage inhalator with indicating/interrupting means

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Sodra Sandby, Sweden

Kjell I Wetterlin