This study will investigate the safety, tolerability, pharmacokinetics and pharmacodynamics of multiple ascending doses of AZD8848 in healthy subjects.

A Phase 1, Single Centre, Double-blind, Randomised, Placebo-controlled, Study to Investigate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics after Administration of Multiple Ascending (MAD) Once Weekly Inhaled Doses of AZD8848 in Healthy Subjects

Inclusion Criteria:

• Healthy male and/or female subjects aged 18 to 50 years (inclusive) with suitable veins for cannulation or repeated venipuncture
• Women must be of non-childbearing potential or must have been stable on a highly effective contraceptive for at least 3 months prior to Screening and be willing to continue on the chosen contraceptive with additonal use of condom until 3 months postdose
• Male subjects should be willing to use barrier contraception ie, condoms, from the first day of investigational product administration until 3 months after the last administration of investigational product
• Have a body mass index (BMI) between 18 and 32 kg/m2 and weigh at least 50 kg and no more than 110 kg
• Women must have a negative pregnancy test at screening and on admission to the study centre, must have a date of last menstruation, must not be lactating or must be of non-childbearing potential

Exclusion Criteria:

• Abnormal vital signs, after 10 minutes supine rest, defined as any of the following: SBP >140 mmHg, Diastolic blood pressure (DBP) >90 mmHg, Heart rate <40 or >85 beats per minute
• History of asthma or allergic rhinitis
• Prolonged QTcF >450 ms or shortened QTcF <340 ms or family history of long QT syndrome
• History of severe allergy/hypersensitivity or ongoing allergy/hypersensitivity, as judged by the Investigator or history of hypersensitivity to drugs with a similar chemical structure or class as AZD8848 - Any clinically significant abnormalities in clinical chemistry.