In 1987, a study of 9 subjects, given 4 weeks of inhaled budesonide dipropionate 1mg daily, were shown to have increase in 2-hour peak glucose level in oral glucose tolerance test, and also increased fasting serum insulin concentration, suggesting that ICS use was associated with glucose dysregulation and increase insulin resistance. Subsequently, in 1993, another study of 15 subjects with unstable asthma compared to 15 normal control subjects, a reduction in insulin resistance in patients with uncontrolled asthma was noted upon 1 month of ICS treatment; while the insulin resistance profile became static at 5 and 8 months of therapy. This study suggests that insulin resistance profile is increased in subjects with unstable asthma in relation to the stress induced during exacerbation. ICS can reduce insulin resistance profile by stabilizing asthma control.