Aerosol carriers
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United States of America Patent
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-
Oct 19, 1993
Grant Date -
N/A
app pub date -
Sep 20, 1991
filing date -
Jan 24, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Pharmaceutical excipients useful in dry powder inhalents comprise particles having a rugosity (measured by air permeametry) of less than 1.75. The use of these carriers increases the amount of drug injested by the patient using a dry powder inhaler. The preferred excipients are crystalline sugars such as lactose which may conveniently be prepared by controlled crystallisation from an aqueous medium.
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