Study in healthy volunteers to investigate the effects of Rifampin on the Pharmacokinetics of NKTR-118

Inclusion Criteria

• - Provision of signed and dated, written informed consent prior to any study-specific procedures.
• - Male and female (nonchildbearing potential, nonlactating) healthy volunteers aged 18 to 55 years inclusive, with suitable veins for cannulation or repeated venipuncture.
• - Female volunteers must have a negative pregnancy test at screening and at admission, must not be lactating, and must be of nonchildbearing potential.
• - Male volunteers should be willing to use barrier contraception ie, condoms, from the first day of dosing until 3 months after dosing with the IP. The female partner should use contraception during this period.
• - Volunteers must have a BMI between 18 and 30 kg/m2, inclusive, and weigh at least 50 kg.