A new study published in The Journal of Asthma assessed the relationship between asthma and diabetes course and the influence of corticosteroid therapy in asthma on diabetes control. In this cross-sectional study 431 adult patients were categorized into subgroups – only asthma, with both asthma and diabetes and with only diabetes. The value of glycated hemoglobin (HbA1c)in patients with asthma and diabetes were compared to values obtained from patients suffering only from diabetes glycated hemoglobin (HbA1c).The diabetes control criteria were met in 48.5% patients with asthma and concomitant diabetes and in 50.6% patients who suffered only from diabetes. The findings revealed a negative relationship between severe asthma and diabetes control. Moreover, a daily dose of budesonide up to 825 mcg used by asthmatic and diabetic patients had no significant influence on the fasting glucose of patients. Hence, it was inferred that the effect of asthma on diabetes does not seem to be significant, except for in patients with severe asthma. Inaddition, inhaled steroids administered in low or mild doses do not affect fasting glycemia.