The aim of this study is to examine the effect of coadministration of CYP3A4 inhibitors on the pharmacokinetics of AZD9742.

Inclusion Criteria:

• non-childbearing potential, with suitable veins for cannulation or repeated venipuncture
• Females must have a negative pregnancy test at screening and on admission to the unit, must not be lactating and must be of non-childbearing potential, confirmed at screening.
• Male volunteers should be willing to use barrier contraception, ie, condoms, from the day of dosing until 3 months after dosing with the investigational product.

Exclusion Criteria:

• History of any clinically significant disease or disorder which, in the opinion of the Investigator, may either put the volunteer at risk because of participation in the study, or influence the results or the volunteer's ability to participate
• History or presence of GI, hepatic, or renal disease or any other condition known to interfere with absorption, distribution, metabolism, or excretion of drugs as judged by Investigator.
• Any clinically significant illness, medical/surgical procedure, or trauma within 4 weeks of the first administration of investigational product