AKITA Inhaled Steroid Suspension for Inhalation (AICS) in Subjects With Asthma

Inclusion Criteria: * Written informed consent prior to the performance of any study-related procedures * Age ≥ 18 and ≤ 65 year of age Diagnosis of asthma (ATS definition, either allergic or non-allergic) for ≥ 6 months * Asthma treated for at least 3 months with inhaled (ICS) and oral corticosteroids (OCS). Exact baseline level will be measured during the screening period by subject diary entries * FEV1 ≥ 40% or ≤ 79% predicted at the Screening or Baseline Visit * Documented increase of FEV1 within 15-30 minutes after the use of inhaled Salbutamol at the Screening Visit or within 2 years prior to Screening * Mandatory usage of long-acting β-agonists * A negative pregnancy test must be available for any women of childbearing potential at screening and, in addition, a negative urine pregnancy test must be present at randomization (prior to randomization to one of the treatment groups!) * Women of childbearing potential must agree to use a reliable method of contraception from the screening until 4 weeks after study completion or after study drug discontinuation in case study drug treatment is stopped prematurely. - In this study, hormone-based contraceptives alone are not considered as reliable method Exclusion Criteria: * History of allergy or adverse experience with Budesonide * Pregnant women or nursing mothers * Upper respiratory tract infection within 4 weeks of Screening * Emergency room visit for treatment of asthma exacerbation within 4 weeks of Screening * Hospitalization for asthma within 3 months of Screening * Use of anti-IgE, methotrexate, oral gold, Dapsone, or i.v. gamma globulin within 3 months of Screening * Treatment with other investigational asthma treatment within 30 days prior to Screening * Evidence of chronic lung diseases other than asthma, including but not limited to: cystic fibrosis, allergic bronchopulmonary aspergillosis (ABPA), COPD, chronic bronchitis and emphysema * History of medication noncompliance * History of significant medical illness or condition that in the Investigator's opinion places the subject at undue risk by participating in the study * Past episode of anaphylaxis with severe respiratory symptoms * Oral corticosteroid average daily dose exceeding a maximum amount * Currently smoking or history of smoking ≥ 10 pack years * Taking oral or i.v. corticosteroids for any disease indication other than asthma * Abnormal lab values for chemistry tests at Screening that may indicate impaired ability to metabolize and/or excrete Budesonide (AST, ALT \> 3 times upper limit of normal range, serum creatinine \> 1.5 times upper limit of normal range)