A Clinical Trial in Healthy Volunteers and Patients With Mild Asthma to Investigate a New Medicine (AZD4604) for the Treatment of Asthma

This is a first in human clinical study. Part 1 of the clinical study will assess the safety and tolerability, as well as the single dose pharmacokinetics (PK), of inhaled AZD4604 in healthy volunteers (Part 1a, single ascending dose \[SAD\]). The single dose administration will be performed with dry powder inhaler (DPI) formulation of AZD4604. When at least 4 cohorts of the SAD part of the study have been completed, AZD4604 will be administered as a single intravenous (IV) or oral (PO) dose to 2 different cohorts of healthy volunteers (Part 1b). The main purpose is to compare the PK between IV, oral and inhaled administration to further characterize the PK properties of AZD4604 by the various administration routes. The results will be used to improve future study design and interpretation. In Part 2 (Multiple ascending dose \[MAD\]), AZD4604 will be administered at multiple doses (twice daily \[BID\], 7 days) to healthy volunteers. In Part 3, AZD4604 will be administered at multiple doses to patients with mild asthma at dose levels assessed in Part 2. The multiple-dose administration will be performed with DPI-formulated AZD4604.