twenty asthmatic volunteers , most with mild disease , underwent dose-response studies with sulfur dioxide ( so2 ) under three pretreatment conditions : ( 1 ) drug ( metaproterenol sulfate in aerosolized saline solution ) , ( 2 ) placebo ( aerosolized saline only ) , and ( 3 ) no pretreatment .
C0004096
asthmatic
C0025573
metaproterenol sulfate