Study to Assess Drug Concentrations in Plasma of Different Extended-release Formulations of AZD1305

Inclusion Criteria: * Provision of signed, written and dated informed consent prior to any study specific procedures. * Body mass index (BMI) between 19 and 30 kg/m2 and weigh at least 50 kg and no more than 100 kg. Exclusion Criteria: * History or presence of any clinically significant disease or disorder in the opinion of the investigator. * Use of nicotine in the last 4 weeks before screening and not more than 7 cigarettes per week (equivalent to 1 nicotine patch or 7 nicotine gums per week) before then. There will be no smoking until follow-up visit. * Any clinically relevant abnormal findings in physical examination, clinical chemistry, haematology, urinalysis, vital signs or ECG at baseline in the opinion of the investigator.