Compare the Same Dosage of Insulin Using a Combination of Cartridges, 30 Units as 2 Cartridges vs. 1 Cartridge

Inclusion Criteria: * Men and women aged 18 to 45 years, considered healthy based on screening physical examination, medical history, clinical chemistry, and urinalysis * No smoking in the past 6 months (including cigarettes, cigars, and pipes) * Urine cotinine testing \< 100 ng/mL * Body mass index \< 32 kg/m2 * Completion of informed consent form Exclusion Criteria: * FBG \> 100 mg/dL * Clinically significant active or chronic illness * History of asthma, chronic obstructive pulmonary disease (COPD), or any other clinically relevant chronic lung disease * Respiratory tract infection within 4 weeks before screening and between the screening visit and dosing visit * Subjects who are experiencing persistent or recurring cough, wheezing, bronchospasm, or dyspnea