Abstract
The plasma concentrations of sodium cromoglycate were measured for 4 h following a single dose of 20 mg given by inhalation to six normal volunteers. A series of forced expiratory manoeuvres was performed 2 h after the dose, which resulted in a rapid and marked increase in the plasma concentrations of the drug. A similar increase was found in three volunteers who undertook a single deep inspiration at 4 h. These data indicate that the absorption of cromoglycate from the airways can be affected by manoeuvres used to assess lung function.
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