The primary aim of this study is to investigate the safety and tolerability of AZD2423 single doses in healthy volunteers.

Inclusion Criteria:

• Provision of signed and dated, written informed consent prior to any study specific procedures
• Have a body mass index (BMI) between ≥18 and ≤30 kg/m2, as calculated by the investigator, and weigh at least 50 kg and no more than 100 kg
• Healthy male and non-fertile female volunteers with suitable veins for cannulation or repeated venipuncture

Exclusion Criteria:

• History of any clinically significant disease or disorder which, in the opinion of the investigator, may either put the subject at risk because of participation in the study,or influence the results or the subject's ability to participate in the study
• History or presence of gastrointestinal, hepatic or renal disease or any other condition known to interfere with absorption, distribution, metabolism or excretion of drugs
• Any clinically significant illness/infection or medical/surgical procedure or trauma,as judged by the Principal Investigator, within 3 months of the first administration of investigational product