Comparison of Liraglutide Inhaled Into the Lungs Compared to Liraglutide Injected Under the Skin in Healthy Male Volunteers

Inclusion Criteria: * No clinically important abnormal physical findings * No clinically relevant abnormalities in the results of laboratory screening evaluation * Normal (or abnormal but not clinically significant) ECG (electrocardiogram) * Normal (or abnormal but not clinically significant) blood pressure and heart rate * Body Mass Index (BMI) between 20-30 kg/m\^2 or outwith range but not clinically significant * Non-smoker * Forced Vital Capacity (FVC) and Forced Expiratory Volume in 1 second (FEV1) at least 85% of predicted normal for age, gender and height * FVC ratio at least 75% of predicted normal for age, gender and height Exclusion Criteria: * A clinically significant illness or infection requiring treatment within the last two months * Any infection involving the respiratory system or adverse event that may, in the opinion of the principal investigator, interfere with blood glucose homeostasis * Subjects with first and/or second degree relative(s) with diabetes mellitus * Donation or loss of greater than 500 ml of blood in the period 0-12 weeks before trial entry * Alcohol use in excess of 28 units of alcohol per week. A unit of alcohol is equivalent to half a pint of average strength beer, a glass (125 ml) of wine or a pub measure (25 ml) of spirits, sherry or port * Current addiction to alcohol or substances of abuse * Females * Presence of hepatitis B surface antigen, hepatitis C antibody or HIV (human immunodeficiency virus) 1 or 2 antibodies